<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:17e82a8d-4fa2-4167-8df9-a9b5316fa5d2,g:5280d471-808f-49c4-9a42-3ce8fd326b89-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.oildri.com/role/CoverPage" xlink:type="simple" xlink:href="odc-20210131.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/CoverPage" xlink:type="extended" id="ib222982821d7478eaba04278757fee1e_CoverPage">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_b29d79e9-5e50-47a1-adfe-23daaced7a9e" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_DocumentType_b29d79e9-5e50-47a1-adfe-23daaced7a9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_03a3934a-f894-4db9-a801-408cad07f0f5" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_DocumentQuarterlyReport_03a3934a-f894-4db9-a801-408cad07f0f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_f8bda72c-d28f-4a1c-92c6-4f962012ebc8" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_DocumentPeriodEndDate_f8bda72c-d28f-4a1c-92c6-4f962012ebc8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_62c810db-e4c5-455d-b255-217d8502a207" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_DocumentTransitionReport_62c810db-e4c5-455d-b255-217d8502a207" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_a04f8ad7-ab39-4333-bead-943fb9c04253" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityFileNumber_a04f8ad7-ab39-4333-bead-943fb9c04253" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_655c6700-3f44-4048-9b17-22df2b436a07" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityRegistrantName_655c6700-3f44-4048-9b17-22df2b436a07" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_73e60987-6761-4521-8d30-db3c62fa23cf" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityCentralIndexKey_73e60987-6761-4521-8d30-db3c62fa23cf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_f22f095f-7920-4f51-a798-33a5e9b848ca" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_CurrentFiscalYearEndDate_f22f095f-7920-4f51-a798-33a5e9b848ca" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_15feffc3-36a5-41f7-bf27-99a34b690f09" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_DocumentFiscalYearFocus_15feffc3-36a5-41f7-bf27-99a34b690f09" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_79fd78db-e91a-45bb-b842-8ebba8f126e1" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_DocumentFiscalPeriodFocus_79fd78db-e91a-45bb-b842-8ebba8f126e1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_5381a6c9-dc5f-4808-b7e0-ec57b3b73af2" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_AmendmentFlag_5381a6c9-dc5f-4808-b7e0-ec57b3b73af2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_59f518e7-3734-4c43-93a6-cb8719c35c51" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityIncorporationStateCountryCode_59f518e7-3734-4c43-93a6-cb8719c35c51" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_ab8fe1f7-7d82-4cd1-bf4f-e282021f423e" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityTaxIdentificationNumber_ab8fe1f7-7d82-4cd1-bf4f-e282021f423e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_e92c9854-0425-4159-a6d2-0269c471df96" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityAddressAddressLine1_e92c9854-0425-4159-a6d2-0269c471df96" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_d61902e2-ebf2-40d1-8ed3-1ab66fbfab09" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityAddressAddressLine2_d61902e2-ebf2-40d1-8ed3-1ab66fbfab09" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_838325b7-abff-4dc1-80d0-affa824a15dd" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityAddressPostalZipCode_838325b7-abff-4dc1-80d0-affa824a15dd" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_ab7805a1-ab61-4af4-86d4-5be4eaf0427a" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityAddressCityOrTown_ab7805a1-ab61-4af4-86d4-5be4eaf0427a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_991e3d53-8f47-4f89-9699-7231895caf97" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityAddressStateOrProvince_991e3d53-8f47-4f89-9699-7231895caf97" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_fc1b42f4-5e2d-41cf-8b84-0de17c47cbb0" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_CityAreaCode_fc1b42f4-5e2d-41cf-8b84-0de17c47cbb0" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_777b3a47-db46-4041-b85e-c098d472b44d" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_LocalPhoneNumber_777b3a47-db46-4041-b85e-c098d472b44d" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_f1c68418-07e2-4906-8f99-5ef26099a1ac" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityCurrentReportingStatus_f1c68418-07e2-4906-8f99-5ef26099a1ac" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_147b8db0-0baa-41ca-87e9-6119ce4ffdf2" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityInteractiveDataCurrent_147b8db0-0baa-41ca-87e9-6119ce4ffdf2" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_c627249e-361f-440c-af34-cf1c5b79f176" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntitySmallBusiness_c627249e-361f-440c-af34-cf1c5b79f176" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_b72f43f0-c346-4332-b81d-ad79f1dc24cb" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityFilerCategory_b72f43f0-c346-4332-b81d-ad79f1dc24cb" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_1f83be5c-ac07-469d-a19a-ad421a8c2cd7" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityEmergingGrowthCompany_1f83be5c-ac07-469d-a19a-ad421a8c2cd7" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_cd81828c-403b-4ae5-961c-a036f5c60c2d" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityShellCompany_cd81828c-403b-4ae5-961c-a036f5c60c2d" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_58c2bce0-3c6d-4a7a-ad5b-0f90213a3fdd" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_Security12bTitle_58c2bce0-3c6d-4a7a-ad5b-0f90213a3fdd" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_2e59a650-b8ea-43be-af70-c75700a5df94" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_TradingSymbol_2e59a650-b8ea-43be-af70-c75700a5df94" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_4570ddd2-5d50-4f43-b568-9234fa33d855" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_SecurityExchangeName_4570ddd2-5d50-4f43-b568-9234fa33d855" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_8deabaa4-5d21-4d62-b388-e6b446c83190" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_8deabaa4-5d21-4d62-b388-e6b446c83190" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_66cd58ff-2119-499f-828f-59d6df98d2fe" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_e446a99a-3c70-4548-96a6-8a715b414b85" xlink:to="loc_dei_EntitiesTable_66cd58ff-2119-499f-828f-59d6df98d2fe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_0e2372db-691b-4cda-b0cb-1f9db7b7e5ac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_66cd58ff-2119-499f-828f-59d6df98d2fe" xlink:to="loc_us-gaap_StatementClassOfStockAxis_0e2372db-691b-4cda-b0cb-1f9db7b7e5ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_0e2372db-691b-4cda-b0cb-1f9db7b7e5ac_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_0e2372db-691b-4cda-b0cb-1f9db7b7e5ac" xlink:to="loc_us-gaap_ClassOfStockDomain_0e2372db-691b-4cda-b0cb-1f9db7b7e5ac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_7a5b1bbc-17b3-4471-98b0-998e4df73c84" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_0e2372db-691b-4cda-b0cb-1f9db7b7e5ac" xlink:to="loc_us-gaap_ClassOfStockDomain_7a5b1bbc-17b3-4471-98b0-998e4df73c84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_6ab03b81-f4c7-4eb5-8ca0-8bd2d174ada4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_7a5b1bbc-17b3-4471-98b0-998e4df73c84" xlink:to="loc_us-gaap_CommonStockMember_6ab03b81-f4c7-4eb5-8ca0-8bd2d174ada4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_6753128e-4e6c-461e-8597-706035ca841d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_7a5b1bbc-17b3-4471-98b0-998e4df73c84" xlink:to="loc_us-gaap_CommonClassBMember_6753128e-4e6c-461e-8597-706035ca841d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/CondensedConsolidatedBalanceSheets" xlink:type="simple" xlink:href="odc-20210131.xsd#CondensedConsolidatedBalanceSheets"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended" id="icc729b1e5f6c42a7a1fa714932bd944d_CondensedConsolidatedBalanceSheets">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_46423009-bea0-4a48-a057-a4ae8d9fd180" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_24aff08c-27e8-475c-ae86-5b82aec072ac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_46423009-bea0-4a48-a057-a4ae8d9fd180" xlink:to="loc_us-gaap_AssetsAbstract_24aff08c-27e8-475c-ae86-5b82aec072ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_7d027924-90a2-48dc-b279-4e2abb7a070e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_24aff08c-27e8-475c-ae86-5b82aec072ac" xlink:to="loc_us-gaap_AssetsCurrentAbstract_7d027924-90a2-48dc-b279-4e2abb7a070e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_e7518f81-d506-45c8-bcf5-ab7a7c540af2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_7d027924-90a2-48dc-b279-4e2abb7a070e" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_e7518f81-d506-45c8-bcf5-ab7a7c540af2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesNetCurrent_ddca5a30-7718-4b5c-ad72-7ae507475d98" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_7d027924-90a2-48dc-b279-4e2abb7a070e" xlink:to="loc_us-gaap_ReceivablesNetCurrent_ddca5a30-7718-4b5c-ad72-7ae507475d98" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_8c24083e-2b81-4312-8397-bdff6b11cfda" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_7d027924-90a2-48dc-b279-4e2abb7a070e" xlink:to="loc_us-gaap_InventoryNet_8c24083e-2b81-4312-8397-bdff6b11cfda" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_Prepaidrepairsexpense_7f08b4a4-8eb0-4cb2-b228-abed0f99346b" xlink:href="odc-20210131.xsd#odc_Prepaidrepairsexpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_7d027924-90a2-48dc-b279-4e2abb7a070e" xlink:to="loc_odc_Prepaidrepairsexpense_7f08b4a4-8eb0-4cb2-b228-abed0f99346b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPrepaidExpenseCurrent_b572f814-fc77-4c59-a1ea-3a68b4dd3951" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherPrepaidExpenseCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_7d027924-90a2-48dc-b279-4e2abb7a070e" xlink:to="loc_us-gaap_OtherPrepaidExpenseCurrent_b572f814-fc77-4c59-a1ea-3a68b4dd3951" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_17f38456-b248-4fd2-b3ff-35a6ed9b42db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_7d027924-90a2-48dc-b279-4e2abb7a070e" xlink:to="loc_us-gaap_AssetsCurrent_17f38456-b248-4fd2-b3ff-35a6ed9b42db" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_cf5f4738-b6a7-4c9d-8d85-5e52fa382a70" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_24aff08c-27e8-475c-ae86-5b82aec072ac" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_cf5f4738-b6a7-4c9d-8d85-5e52fa382a70" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_06fa6572-06bf-4feb-af0d-bc3f5bbf575e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_cf5f4738-b6a7-4c9d-8d85-5e52fa382a70" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_06fa6572-06bf-4feb-af0d-bc3f5bbf575e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_b85b37c5-e28a-4605-82f6-d2ac1109f28a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_cf5f4738-b6a7-4c9d-8d85-5e52fa382a70" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_b85b37c5-e28a-4605-82f6-d2ac1109f28a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_35bf7b46-c435-42dc-8c39-517670478a05" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_cf5f4738-b6a7-4c9d-8d85-5e52fa382a70" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_35bf7b46-c435-42dc-8c39-517670478a05" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrentAbstract_4af3f53b-b62e-47e9-b161-4a8edf55ebc1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_24aff08c-27e8-475c-ae86-5b82aec072ac" xlink:to="loc_us-gaap_OtherAssetsNoncurrentAbstract_4af3f53b-b62e-47e9-b161-4a8edf55ebc1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_61ba714c-1179-4892-b487-aef81fbc5298" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_4af3f53b-b62e-47e9-b161-4a8edf55ebc1" xlink:to="loc_us-gaap_Goodwill_61ba714c-1179-4892-b487-aef81fbc5298" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_Trademarksandpatentsnet_57840d29-c6ec-4ef2-8063-656f656d64b5" xlink:href="odc-20210131.xsd#odc_Trademarksandpatentsnet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_4af3f53b-b62e-47e9-b161-4a8edf55ebc1" xlink:to="loc_odc_Trademarksandpatentsnet_57840d29-c6ec-4ef2-8063-656f656d64b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_Customerlistnet_6d1f3b06-06e9-4b47-b81e-0c2558d9df99" xlink:href="odc-20210131.xsd#odc_Customerlistnet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_4af3f53b-b62e-47e9-b161-4a8edf55ebc1" xlink:to="loc_odc_Customerlistnet_6d1f3b06-06e9-4b47-b81e-0c2558d9df99" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_02cd86dd-7b4d-419d-b93a-33b2b378284f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_4af3f53b-b62e-47e9-b161-4a8edf55ebc1" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_02cd86dd-7b4d-419d-b93a-33b2b378284f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_845c1f9c-80b7-4844-9d3b-94a78814331f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_4af3f53b-b62e-47e9-b161-4a8edf55ebc1" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_845c1f9c-80b7-4844-9d3b-94a78814331f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_b7f90de1-6cf5-4aa4-90e1-2c58e61fce2a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_4af3f53b-b62e-47e9-b161-4a8edf55ebc1" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_b7f90de1-6cf5-4aa4-90e1-2c58e61fce2a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrent_d56bdfd9-5a93-487b-b2b8-9d5ab0bce4ea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_4af3f53b-b62e-47e9-b161-4a8edf55ebc1" xlink:to="loc_us-gaap_AssetsNoncurrent_d56bdfd9-5a93-487b-b2b8-9d5ab0bce4ea" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_8c71ff2d-6c88-4e62-9866-0571c1840b14" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_24aff08c-27e8-475c-ae86-5b82aec072ac" xlink:to="loc_us-gaap_Assets_8c71ff2d-6c88-4e62-9866-0571c1840b14" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b954c50f-a725-450d-84ea-538ebfe479ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_46423009-bea0-4a48-a057-a4ae8d9fd180" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b954c50f-a725-450d-84ea-538ebfe479ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_57ef9e97-55d0-4158-b596-6cb34734a00e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b954c50f-a725-450d-84ea-538ebfe479ca" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_57ef9e97-55d0-4158-b596-6cb34734a00e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesCurrent_e9588acb-6961-4267-85c4-123169475dc5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SeniorNotesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_57ef9e97-55d0-4158-b596-6cb34734a00e" xlink:to="loc_us-gaap_SeniorNotesCurrent_e9588acb-6961-4267-85c4-123169475dc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_b3eee230-df31-4877-a138-fd90eeb2d2e2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_57ef9e97-55d0-4158-b596-6cb34734a00e" xlink:to="loc_us-gaap_AccountsPayableCurrent_b3eee230-df31-4877-a138-fd90eeb2d2e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrent_0b8cd884-dc5c-4088-987a-c8b98826372d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_57ef9e97-55d0-4158-b596-6cb34734a00e" xlink:to="loc_us-gaap_DividendsPayableCurrent_0b8cd884-dc5c-4088-987a-c8b98826372d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_1999fcdc-fae8-4c75-94bf-69693ee61f09" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_57ef9e97-55d0-4158-b596-6cb34734a00e" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_1999fcdc-fae8-4c75-94bf-69693ee61f09" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_bccb01d5-7a2e-410d-8d40-d6cac9b22bbd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_57ef9e97-55d0-4158-b596-6cb34734a00e" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_bccb01d5-7a2e-410d-8d40-d6cac9b22bbd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_88fe4b9b-1433-454d-b2fc-2f056d430dae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_57ef9e97-55d0-4158-b596-6cb34734a00e" xlink:to="loc_us-gaap_LiabilitiesCurrent_88fe4b9b-1433-454d-b2fc-2f056d430dae" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_c28c0053-d3e3-4bd8-998c-9bbc04a19729" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b954c50f-a725-450d-84ea-538ebfe479ca" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_c28c0053-d3e3-4bd8-998c-9bbc04a19729" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorLongTermNotes_9e638a5e-65a2-4558-bc95-d61d260db993" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SeniorLongTermNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_c28c0053-d3e3-4bd8-998c-9bbc04a19729" xlink:to="loc_us-gaap_SeniorLongTermNotes_9e638a5e-65a2-4558-bc95-d61d260db993" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_f6a9ded4-e95e-4c04-ba0d-a29f1dc036b4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_c28c0053-d3e3-4bd8-998c-9bbc04a19729" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_f6a9ded4-e95e-4c04-ba0d-a29f1dc036b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_ce74bbad-ea4e-4f8f-b8ec-6718fde7ee93" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_c28c0053-d3e3-4bd8-998c-9bbc04a19729" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_ce74bbad-ea4e-4f8f-b8ec-6718fde7ee93" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_8d0a4b1a-5fa4-4f9e-85f9-3d5b92a1ddd1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_c28c0053-d3e3-4bd8-998c-9bbc04a19729" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_8d0a4b1a-5fa4-4f9e-85f9-3d5b92a1ddd1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_bba46d79-8609-4294-9741-e61f0d5f3c8c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_c28c0053-d3e3-4bd8-998c-9bbc04a19729" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_bba46d79-8609-4294-9741-e61f0d5f3c8c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_fcf7923e-56d4-48c0-89a5-9323f15c0b91" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_c28c0053-d3e3-4bd8-998c-9bbc04a19729" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_fcf7923e-56d4-48c0-89a5-9323f15c0b91" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_47b1a8e6-d0ed-42b5-8865-9e84b4242e89" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b954c50f-a725-450d-84ea-538ebfe479ca" xlink:to="loc_us-gaap_Liabilities_47b1a8e6-d0ed-42b5-8865-9e84b4242e89" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_bca88b5d-c518-4209-8a7b-7632132151fc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b954c50f-a725-450d-84ea-538ebfe479ca" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_bca88b5d-c518-4209-8a7b-7632132151fc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_87a4b7e3-f409-45b1-afda-840de7229ecd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_bca88b5d-c518-4209-8a7b-7632132151fc" xlink:to="loc_us-gaap_CommonStockValue_87a4b7e3-f409-45b1-afda-840de7229ecd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_20b93237-2b0e-4a2b-b25e-a6f90166685b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_bca88b5d-c518-4209-8a7b-7632132151fc" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_20b93237-2b0e-4a2b-b25e-a6f90166685b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_7cb3a3ac-22f5-474c-9569-f6584f74f59d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_bca88b5d-c518-4209-8a7b-7632132151fc" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_7cb3a3ac-22f5-474c-9569-f6584f74f59d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_d464e76e-f8e7-4cc7-9a07-a70560ded863" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_bca88b5d-c518-4209-8a7b-7632132151fc" xlink:to="loc_us-gaap_MinorityInterest_d464e76e-f8e7-4cc7-9a07-a70560ded863" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_4096e403-4c49-486d-a928-a58abb475a36" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_bca88b5d-c518-4209-8a7b-7632132151fc" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_4096e403-4c49-486d-a928-a58abb475a36" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_61f14ab2-b1ac-401e-91fe-ba7e4f3bac78" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_4096e403-4c49-486d-a928-a58abb475a36" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_61f14ab2-b1ac-401e-91fe-ba7e4f3bac78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_021db24a-e76f-4aea-a422-a758d7adb227" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_4096e403-4c49-486d-a928-a58abb475a36" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_021db24a-e76f-4aea-a422-a758d7adb227" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_39e6d0e6-a733-49c2-a815-991c67d52a4d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_4096e403-4c49-486d-a928-a58abb475a36" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_39e6d0e6-a733-49c2-a815-991c67d52a4d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_97a0d008-9eee-49f3-8507-c05ef0e485ab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_bca88b5d-c518-4209-8a7b-7632132151fc" xlink:to="loc_us-gaap_TreasuryStockValue_97a0d008-9eee-49f3-8507-c05ef0e485ab" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_06d2b82a-f4f1-4430-905f-2b5eef29c7a0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_bca88b5d-c518-4209-8a7b-7632132151fc" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_06d2b82a-f4f1-4430-905f-2b5eef29c7a0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_8d73cda5-b0de-4433-ae2a-44acf03a7264" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_b954c50f-a725-450d-84ea-538ebfe479ca" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_8d73cda5-b0de-4433-ae2a-44acf03a7264" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_2c75341f-682f-4f25-a041-654e8b19274f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_46423009-bea0-4a48-a057-a4ae8d9fd180" xlink:to="loc_us-gaap_StatementTable_2c75341f-682f-4f25-a041-654e8b19274f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_b36a84fd-4ec3-4bc1-a797-352c6ab652ab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2c75341f-682f-4f25-a041-654e8b19274f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_b36a84fd-4ec3-4bc1-a797-352c6ab652ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_b36a84fd-4ec3-4bc1-a797-352c6ab652ab_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_b36a84fd-4ec3-4bc1-a797-352c6ab652ab" xlink:to="loc_us-gaap_ClassOfStockDomain_b36a84fd-4ec3-4bc1-a797-352c6ab652ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_22656cbf-9c89-4f66-8ccd-8a97053cbd13" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_b36a84fd-4ec3-4bc1-a797-352c6ab652ab" xlink:to="loc_us-gaap_ClassOfStockDomain_22656cbf-9c89-4f66-8ccd-8a97053cbd13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_9c6578fc-b67e-49ff-8c19-6ee3292fd1ef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_22656cbf-9c89-4f66-8ccd-8a97053cbd13" xlink:to="loc_us-gaap_CommonStockMember_9c6578fc-b67e-49ff-8c19-6ee3292fd1ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_d95ac50c-d421-4958-8342-9ce9346a486c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_22656cbf-9c89-4f66-8ccd-8a97053cbd13" xlink:to="loc_us-gaap_CommonClassBMember_d95ac50c-d421-4958-8342-9ce9346a486c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/CondensedConsolidatedBalanceSheetParenthetical" xlink:type="simple" xlink:href="odc-20210131.xsd#CondensedConsolidatedBalanceSheetParenthetical"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/CondensedConsolidatedBalanceSheetParenthetical" xlink:type="extended" id="i8f2612c793244d43bb2bd3baca61002d_CondensedConsolidatedBalanceSheetParenthetical">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_1df41065-1eea-46c3-b6da-5c792d4c7dd1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_6e460c7c-0c4d-4b35-a46d-e0334e9603aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1df41065-1eea-46c3-b6da-5c792d4c7dd1" xlink:to="loc_us-gaap_AssetsCurrentAbstract_6e460c7c-0c4d-4b35-a46d-e0334e9603aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_9b39c189-82cf-4a81-937b-df187370b345" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_6e460c7c-0c4d-4b35-a46d-e0334e9603aa" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_9b39c189-82cf-4a81-937b-df187370b345" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrentAbstract_eba17d29-3ad9-4b11-aebc-3792603774f5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1df41065-1eea-46c3-b6da-5c792d4c7dd1" xlink:to="loc_us-gaap_OtherAssetsNoncurrentAbstract_eba17d29-3ad9-4b11-aebc-3792603774f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_TrademarksandpatentsaccumulatedAmortization_8483c3c7-3f43-4243-994f-1ad261e04f60" xlink:href="odc-20210131.xsd#odc_TrademarksandpatentsaccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_eba17d29-3ad9-4b11-aebc-3792603774f5" xlink:to="loc_odc_TrademarksandpatentsaccumulatedAmortization_8483c3c7-3f43-4243-994f-1ad261e04f60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_Customerlistaccumulatedamortization_f6790480-b23c-4d63-8286-5d524fa09572" xlink:href="odc-20210131.xsd#odc_Customerlistaccumulatedamortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_eba17d29-3ad9-4b11-aebc-3792603774f5" xlink:to="loc_odc_Customerlistaccumulatedamortization_f6790480-b23c-4d63-8286-5d524fa09572" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_98ec6837-4f43-4378-9fd5-820f5452a19d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1df41065-1eea-46c3-b6da-5c792d4c7dd1" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_98ec6837-4f43-4378-9fd5-820f5452a19d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_d745f233-f6fe-40b8-a2b6-809f86b78b68" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1df41065-1eea-46c3-b6da-5c792d4c7dd1" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_d745f233-f6fe-40b8-a2b6-809f86b78b68" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_b6584028-588b-4e3f-ac4f-34766aaa211d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_d745f233-f6fe-40b8-a2b6-809f86b78b68" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_b6584028-588b-4e3f-ac4f-34766aaa211d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_b179f06b-8ad6-45c7-a912-8656568bbb31" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1df41065-1eea-46c3-b6da-5c792d4c7dd1" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_b179f06b-8ad6-45c7-a912-8656568bbb31" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_d6157b45-a896-4c9a-a4ab-f0a1c4ded94b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_b179f06b-8ad6-45c7-a912-8656568bbb31" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_d6157b45-a896-4c9a-a4ab-f0a1c4ded94b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_f6cb6020-ee87-4c41-8a97-95d48de5e800" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_b179f06b-8ad6-45c7-a912-8656568bbb31" xlink:to="loc_us-gaap_CommonStockSharesIssued_f6cb6020-ee87-4c41-8a97-95d48de5e800" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockShares_5d0c03e8-794e-42d1-b8f7-a9399b5e82c5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_b179f06b-8ad6-45c7-a912-8656568bbb31" xlink:to="loc_us-gaap_TreasuryStockShares_5d0c03e8-794e-42d1-b8f7-a9399b5e82c5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_af7a4498-1394-4ef1-9a18-041f96553833" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1df41065-1eea-46c3-b6da-5c792d4c7dd1" xlink:to="loc_us-gaap_StatementTable_af7a4498-1394-4ef1-9a18-041f96553833" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_606c05cd-dd91-4cae-b46a-b8fb90c2a33c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_af7a4498-1394-4ef1-9a18-041f96553833" xlink:to="loc_us-gaap_StatementClassOfStockAxis_606c05cd-dd91-4cae-b46a-b8fb90c2a33c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_606c05cd-dd91-4cae-b46a-b8fb90c2a33c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_606c05cd-dd91-4cae-b46a-b8fb90c2a33c" xlink:to="loc_us-gaap_ClassOfStockDomain_606c05cd-dd91-4cae-b46a-b8fb90c2a33c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_ef9aa0f1-5573-4df8-8188-60d2d050432a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_606c05cd-dd91-4cae-b46a-b8fb90c2a33c" xlink:to="loc_us-gaap_ClassOfStockDomain_ef9aa0f1-5573-4df8-8188-60d2d050432a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_bb5a2510-4729-4ae3-9889-74b495049ef4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_ef9aa0f1-5573-4df8-8188-60d2d050432a" xlink:to="loc_us-gaap_CommonStockMember_bb5a2510-4729-4ae3-9889-74b495049ef4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_aea34d47-45c6-4ebe-a81a-709fe726012b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_ef9aa0f1-5573-4df8-8188-60d2d050432a" xlink:to="loc_us-gaap_CommonClassBMember_aea34d47-45c6-4ebe-a81a-709fe726012b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/CondensedConsolidatedStatementsofIncome" xlink:type="simple" xlink:href="odc-20210131.xsd#CondensedConsolidatedStatementsofIncome"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/CondensedConsolidatedStatementsofIncome" xlink:type="extended" id="idf7eb4a8685547da9a8d2274471d4e10_CondensedConsolidatedStatementsofIncome">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0977b836-567e-4d6f-8797-359df2dd3b5e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0977b836-567e-4d6f-8797-359df2dd3b5e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_b9fe12f1-b2d8-48d9-8e4f-dd664c15fb83" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_b9fe12f1-b2d8-48d9-8e4f-dd664c15fb83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_01337e08-2c8e-4a78-b9e8-9a8a1edf1f74" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_GrossProfit_01337e08-2c8e-4a78-b9e8-9a8a1edf1f74" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_815cc5ef-4f4c-4b9c-8dc4-7c479cd665f1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_815cc5ef-4f4c-4b9c-8dc4-7c479cd665f1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_dada5e43-3574-484a-aa04-33dbf4a359d2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_OperatingIncomeLoss_dada5e43-3574-484a-aa04-33dbf4a359d2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_ebc9476f-e8ed-447e-a770-96ff9c707b44" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_ebc9476f-e8ed-447e-a770-96ff9c707b44" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_f38554db-10d0-4d09-b35f-4ab12be6eea9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_ebc9476f-e8ed-447e-a770-96ff9c707b44" xlink:to="loc_us-gaap_InterestExpenseDebt_f38554db-10d0-4d09-b35f-4ab12be6eea9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_36e5a2bf-09e5-4a57-a3c0-ea0c09ca3f93" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_ebc9476f-e8ed-447e-a770-96ff9c707b44" xlink:to="loc_us-gaap_InvestmentIncomeInterest_36e5a2bf-09e5-4a57-a3c0-ea0c09ca3f93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_058cf6d6-4251-4662-afd4-74e767ade4d0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_ebc9476f-e8ed-447e-a770-96ff9c707b44" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_058cf6d6-4251-4662-afd4-74e767ade4d0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_b7abd893-cd31-4937-b2bb-25d6fa8b608d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_ebc9476f-e8ed-447e-a770-96ff9c707b44" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_b7abd893-cd31-4937-b2bb-25d6fa8b608d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_6d316005-7bac-49d5-bc00-48bbd1bdbc6d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_6d316005-7bac-49d5-bc00-48bbd1bdbc6d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_afd80c97-a19f-4727-9782-12661f09608f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_afd80c97-a19f-4727-9782-12661f09608f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_956e6d8a-32c2-4f12-ac12-976e807410ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_ProfitLoss_956e6d8a-32c2-4f12-ac12-976e807410ce" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_ab56532f-35e8-45ac-8001-746018fc2074" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_ab56532f-35e8-45ac-8001-746018fc2074" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_459010b4-a06e-4435-adc9-84c901b18a0e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_NetIncomeLoss_459010b4-a06e-4435-adc9-84c901b18a0e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_6ab513d0-9d32-4f27-91b1-22163e7c158e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_EarningsPerShareAbstract_6ab513d0-9d32-4f27-91b1-22163e7c158e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_6a663b74-37a7-4bfe-92c8-cd595873c62b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_6ab513d0-9d32-4f27-91b1-22163e7c158e" xlink:to="loc_us-gaap_EarningsPerShareBasic_6a663b74-37a7-4bfe-92c8-cd595873c62b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_28c20191-b25d-4d42-8cbd-be21a41c59a3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_6ab513d0-9d32-4f27-91b1-22163e7c158e" xlink:to="loc_us-gaap_EarningsPerShareDiluted_28c20191-b25d-4d42-8cbd-be21a41c59a3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_WeightedAverageSharesOutstandingAbstract_c08f7b64-9ea4-4d8f-84c2-01b436c82e88" xlink:href="odc-20210131.xsd#odc_WeightedAverageSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_odc_WeightedAverageSharesOutstandingAbstract_c08f7b64-9ea4-4d8f-84c2-01b436c82e88" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_548d5d7a-a2ef-4154-bb04-35fc67d5d992" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_odc_WeightedAverageSharesOutstandingAbstract_c08f7b64-9ea4-4d8f-84c2-01b436c82e88" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_548d5d7a-a2ef-4154-bb04-35fc67d5d992" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_dd67fecd-0c92-4eeb-b585-070464eea8fa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_odc_WeightedAverageSharesOutstandingAbstract_c08f7b64-9ea4-4d8f-84c2-01b436c82e88" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_dd67fecd-0c92-4eeb-b585-070464eea8fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_0d2a4253-ad9e-4c13-9e76-7aeb3fe31c72" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_0d2a4253-ad9e-4c13-9e76-7aeb3fe31c72" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_1c81ccd4-0492-4295-b546-9c27b9899109" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_88ebf0b9-bf05-454f-a804-4150b0daa426" xlink:to="loc_us-gaap_StatementTable_1c81ccd4-0492-4295-b546-9c27b9899109" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_d2b5bfa7-4631-4f25-87df-6738de9fb50c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1c81ccd4-0492-4295-b546-9c27b9899109" xlink:to="loc_us-gaap_StatementClassOfStockAxis_d2b5bfa7-4631-4f25-87df-6738de9fb50c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_d2b5bfa7-4631-4f25-87df-6738de9fb50c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_d2b5bfa7-4631-4f25-87df-6738de9fb50c" xlink:to="loc_us-gaap_ClassOfStockDomain_d2b5bfa7-4631-4f25-87df-6738de9fb50c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_453cca34-7f52-47f6-8af0-d2301c92d8ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_d2b5bfa7-4631-4f25-87df-6738de9fb50c" xlink:to="loc_us-gaap_ClassOfStockDomain_453cca34-7f52-47f6-8af0-d2301c92d8ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_fc9e8f40-8766-4a5b-839f-83f5c2345e34" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_453cca34-7f52-47f6-8af0-d2301c92d8ce" xlink:to="loc_us-gaap_CommonStockMember_fc9e8f40-8766-4a5b-839f-83f5c2345e34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_702febd6-9d3a-4279-a70f-99d7e4a6cc94" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_453cca34-7f52-47f6-8af0-d2301c92d8ce" xlink:to="loc_us-gaap_CommonClassBMember_702febd6-9d3a-4279-a70f-99d7e4a6cc94" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/CondensedConsolidatedStatementsofComprehensiveIncome" xlink:type="simple" xlink:href="odc-20210131.xsd#CondensedConsolidatedStatementsofComprehensiveIncome"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/CondensedConsolidatedStatementsofComprehensiveIncome" xlink:type="extended" id="i5d81da6157bf415eb346397e606b2775_CondensedConsolidatedStatementsofComprehensiveIncome">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_89ee2e22-c513-435e-af32-9b47ea86a916" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_a3d02031-5294-41aa-9043-83eefe9eb5b6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_89ee2e22-c513-435e-af32-9b47ea86a916" xlink:to="loc_us-gaap_NetIncomeLoss_a3d02031-5294-41aa-9043-83eefe9eb5b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_12b9de92-d375-4fe5-9598-63e22a1c2f3c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_89ee2e22-c513-435e-af32-9b47ea86a916" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_12b9de92-d375-4fe5-9598-63e22a1c2f3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_6e87036a-2058-42c4-8b42-e0f53b54f67a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_12b9de92-d375-4fe5-9598-63e22a1c2f3c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_6e87036a-2058-42c4-8b42-e0f53b54f67a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_bc35aa04-f38c-4849-a0d1-b3c97b54d8ad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_12b9de92-d375-4fe5-9598-63e22a1c2f3c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_bc35aa04-f38c-4849-a0d1-b3c97b54d8ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_330bb58a-d483-4b1e-b05e-7e9fbdeb1a56" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_12b9de92-d375-4fe5-9598-63e22a1c2f3c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_330bb58a-d483-4b1e-b05e-7e9fbdeb1a56" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_c5f1c335-ae06-4b5d-b535-1eb2fff4b457" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_89ee2e22-c513-435e-af32-9b47ea86a916" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_c5f1c335-ae06-4b5d-b535-1eb2fff4b457" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_87327757-144f-4124-af7c-8cfc99459766" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_89ee2e22-c513-435e-af32-9b47ea86a916" xlink:to="loc_us-gaap_StatementTable_87327757-144f-4124-af7c-8cfc99459766" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_447f7a89-1051-4f80-9a6e-0b171305fc2a" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_87327757-144f-4124-af7c-8cfc99459766" xlink:to="loc_srt_StatementScenarioAxis_447f7a89-1051-4f80-9a6e-0b171305fc2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_447f7a89-1051-4f80-9a6e-0b171305fc2a_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_447f7a89-1051-4f80-9a6e-0b171305fc2a" xlink:to="loc_srt_ScenarioUnspecifiedDomain_447f7a89-1051-4f80-9a6e-0b171305fc2a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_87ab9495-96a6-49d6-8fe4-1a1f27b7d998" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_447f7a89-1051-4f80-9a6e-0b171305fc2a" xlink:to="loc_srt_ScenarioUnspecifiedDomain_87ab9495-96a6-49d6-8fe4-1a1f27b7d998" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/ConsolidatedStatementsofStockholdersEquityStatement" xlink:type="simple" xlink:href="odc-20210131.xsd#ConsolidatedStatementsofStockholdersEquityStatement"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/ConsolidatedStatementsofStockholdersEquityStatement" xlink:type="extended" id="i1c72bc29c004487fafb341e370e6c4b4_ConsolidatedStatementsofStockholdersEquityStatement">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_93d68afe-77ce-4e48-8999-5950ec6c8573" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_93d68afe-77ce-4e48-8999-5950ec6c8573" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_35768d44-6540-44d8-9ab1-42b460fc8b2e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_35768d44-6540-44d8-9ab1-42b460fc8b2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_364690c4-adb3-40da-99eb-d8391f8bbea5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_364690c4-adb3-40da-99eb-d8391f8bbea5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_7d75e4c9-f7f2-4089-a5c1-54bdccc76dfe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_TreasuryStockCommonShares_7d75e4c9-f7f2-4089-a5c1-54bdccc76dfe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_e86ea8a3-8d05-4d6d-a9dd-9b6c023513f5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_NetIncomeLoss_e86ea8a3-8d05-4d6d-a9dd-9b6c023513f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_0d61a905-83b8-419d-b8b6-45fa8976817c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_0d61a905-83b8-419d-b8b6-45fa8976817c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_3d98ccad-6d08-4bc2-b743-262945b957f6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_ProfitLoss_3d98ccad-6d08-4bc2-b743-262945b957f6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_0f829c23-3578-4b1c-a2eb-c7d732269373" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_0f829c23-3578-4b1c-a2eb-c7d732269373" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_60ed27fe-bfe3-4c4d-af77-efb68ff7e730" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_DividendsCommonStockCash_60ed27fe-bfe3-4c4d-af77-efb68ff7e730" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_98394434-6a62-4520-810f-87a731559d08" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_98394434-6a62-4520-810f-87a731559d08" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_f13b2fb4-eaa9-40aa-bf05-a0385d7e0b6c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_f13b2fb4-eaa9-40aa-bf05-a0385d7e0b6c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_067a5569-cea5-4ccd-aba8-06511345967e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_067a5569-cea5-4ccd-aba8-06511345967e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_fc9d864b-59af-410c-b9fd-6ae01f1d751a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_fc9d864b-59af-410c-b9fd-6ae01f1d751a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_ca61c5aa-baf9-45c4-8208-125a4a3c3e82" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_ca61c5aa-baf9-45c4-8208-125a4a3c3e82" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMinorityShareholders_53041d88-006f-4d6a-99a6-bb74456f0f5c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromMinorityShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1f256d65-fee4-498a-b34e-1546bea00f87" xlink:to="loc_us-gaap_ProceedsFromMinorityShareholders_53041d88-006f-4d6a-99a6-bb74456f0f5c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_7b398d62-c670-4f9e-8c5a-e025f5067629" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_58bca79e-5839-44d1-8e04-97a03ed52d97" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_e9f1d849-fa85-4f80-a726-115c932f9fd5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_a5c8a508-5734-4cc9-a024-5da178a2a981" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_93d68afe-77ce-4e48-8999-5950ec6c8573" xlink:to="loc_us-gaap_StatementTable_a5c8a508-5734-4cc9-a024-5da178a2a981" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_57b944fa-b9c6-47e7-b809-731ea87f8193" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_a5c8a508-5734-4cc9-a024-5da178a2a981" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_57b944fa-b9c6-47e7-b809-731ea87f8193" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_57b944fa-b9c6-47e7-b809-731ea87f8193_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_57b944fa-b9c6-47e7-b809-731ea87f8193" xlink:to="loc_us-gaap_EquityComponentDomain_57b944fa-b9c6-47e7-b809-731ea87f8193_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_c220b4a0-0d38-4be7-8fcd-465df2b51124" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_57b944fa-b9c6-47e7-b809-731ea87f8193" xlink:to="loc_us-gaap_EquityComponentDomain_c220b4a0-0d38-4be7-8fcd-465df2b51124" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_e5d78cef-b9e3-418c-9734-3e5600e7efad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c220b4a0-0d38-4be7-8fcd-465df2b51124" xlink:to="loc_us-gaap_CommonStockMember_e5d78cef-b9e3-418c-9734-3e5600e7efad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_a60cc2d6-6b58-4914-ac79-4e1fbb480afe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c220b4a0-0d38-4be7-8fcd-465df2b51124" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_a60cc2d6-6b58-4914-ac79-4e1fbb480afe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_55ad9da9-d89e-4747-8b53-2a3085784882" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c220b4a0-0d38-4be7-8fcd-465df2b51124" xlink:to="loc_us-gaap_RetainedEarningsMember_55ad9da9-d89e-4747-8b53-2a3085784882" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_c1ea21a2-2e55-42d0-bc3b-67f326fd3651" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c220b4a0-0d38-4be7-8fcd-465df2b51124" xlink:to="loc_us-gaap_TreasuryStockCommonMember_c1ea21a2-2e55-42d0-bc3b-67f326fd3651" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_00ac6de9-363e-4699-bc0e-f50a50b9019e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c220b4a0-0d38-4be7-8fcd-465df2b51124" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_00ac6de9-363e-4699-bc0e-f50a50b9019e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_d02d25e6-dc48-4179-b266-4528693828a3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c220b4a0-0d38-4be7-8fcd-465df2b51124" xlink:to="loc_us-gaap_NoncontrollingInterestMember_d02d25e6-dc48-4179-b266-4528693828a3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestLineItems_8d9ce562-3b11-4040-955d-30084200d05e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_NoncontrollingInterestParentOwnershipPercentagePriortoPurchaseofAdditionalInterest_334c3d7a-b5c1-43dd-b283-b5f07eab901a" xlink:href="odc-20210131.xsd#odc_NoncontrollingInterestParentOwnershipPercentagePriortoPurchaseofAdditionalInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_8d9ce562-3b11-4040-955d-30084200d05e" xlink:to="loc_odc_NoncontrollingInterestParentOwnershipPercentagePriortoPurchaseofAdditionalInterest_334c3d7a-b5c1-43dd-b283-b5f07eab901a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_4c501cf5-2cf4-4a42-8d4a-a3ac0bda33ba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_8d9ce562-3b11-4040-955d-30084200d05e" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_4c501cf5-2cf4-4a42-8d4a-a3ac0bda33ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent_0f71b2c6-1db6-495c-a532-4f6260cc876a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_8d9ce562-3b11-4040-955d-30084200d05e" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent_0f71b2c6-1db6-495c-a532-4f6260cc876a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_NoncontrollingInterestOwnershipPercentagePriortoParentsPurchaseofAdditionalInterest_c929fa4e-5637-4422-8d86-1df6f5e31207" xlink:href="odc-20210131.xsd#odc_NoncontrollingInterestOwnershipPercentagePriortoParentsPurchaseofAdditionalInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_8d9ce562-3b11-4040-955d-30084200d05e" xlink:to="loc_odc_NoncontrollingInterestOwnershipPercentagePriortoParentsPurchaseofAdditionalInterest_c929fa4e-5637-4422-8d86-1df6f5e31207" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_102f91b2-2ba0-44e9-b67e-1113647f630e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_8d9ce562-3b11-4040-955d-30084200d05e" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_102f91b2-2ba0-44e9-b67e-1113647f630e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestTable_fcf789f4-0771-4619-b2c2-618ccd4aec05" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MinorityInterestLineItems_8d9ce562-3b11-4040-955d-30084200d05e" xlink:to="loc_us-gaap_MinorityInterestTable_fcf789f4-0771-4619-b2c2-618ccd4aec05" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_4b855a40-d57b-45ad-8287-1ceee00aad2b" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_fcf789f4-0771-4619-b2c2-618ccd4aec05" xlink:to="loc_srt_OwnershipAxis_4b855a40-d57b-45ad-8287-1ceee00aad2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_4b855a40-d57b-45ad-8287-1ceee00aad2b_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_4b855a40-d57b-45ad-8287-1ceee00aad2b" xlink:to="loc_srt_OwnershipDomain_4b855a40-d57b-45ad-8287-1ceee00aad2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_476774e5-450c-4e83-9601-99d6c1ab7e6f" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_4b855a40-d57b-45ad-8287-1ceee00aad2b" xlink:to="loc_srt_OwnershipDomain_476774e5-450c-4e83-9601-99d6c1ab7e6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_NoncontrollingInterestAgromexMember_e18b543f-b514-414f-b8d4-a907576120d8" xlink:href="odc-20210131.xsd#odc_NoncontrollingInterestAgromexMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_476774e5-450c-4e83-9601-99d6c1ab7e6f" xlink:to="loc_odc_NoncontrollingInterestAgromexMember_e18b543f-b514-414f-b8d4-a907576120d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_ParentOilDriCorporationofAmericaMember_322bf610-d138-4b3b-bfbb-c1bf33554c59" xlink:href="odc-20210131.xsd#odc_ParentOilDriCorporationofAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_476774e5-450c-4e83-9601-99d6c1ab7e6f" xlink:to="loc_odc_ParentOilDriCorporationofAmericaMember_322bf610-d138-4b3b-bfbb-c1bf33554c59" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/CondensedConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="odc-20210131.xsd#CondensedConsolidatedStatementsofCashFlows"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/CondensedConsolidatedStatementsofCashFlows" xlink:type="extended" id="i724372f4ce5048c6af146c84fb92d0eb_CondensedConsolidatedStatementsofCashFlows">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_c5c17b9a-d7e8-44a4-842b-3c0388a82c2b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_04ed7112-bd2a-4a15-9317-59b0e6a6a153" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c5c17b9a-d7e8-44a4-842b-3c0388a82c2b" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_04ed7112-bd2a-4a15-9317-59b0e6a6a153" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_d9a69c42-67f5-4c4c-8e87-f795dd24a7d6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_04ed7112-bd2a-4a15-9317-59b0e6a6a153" xlink:to="loc_us-gaap_ProfitLoss_d9a69c42-67f5-4c4c-8e87-f795dd24a7d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_04ed7112-bd2a-4a15-9317-59b0e6a6a153" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_bb804d58-d41d-484e-b82e-afd3e078ee88" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_DepreciationAmortizationAndAccretionNet_bb804d58-d41d-484e-b82e-afd3e078ee88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_2e56e166-acdd-4381-b753-7d47563259cf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_2e56e166-acdd-4381-b753-7d47563259cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_d0afbf11-64bf-499f-b9a6-3f1cb9badd41" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_ShareBasedCompensation_d0afbf11-64bf-499f-b9a6-3f1cb9badd41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_96a34bdb-0108-4194-9193-a7cd9164e662" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_96a34bdb-0108-4194-9193-a7cd9164e662" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_f12facf3-ff06-442e-a141-35c1d9ef8ed9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_f12facf3-ff06-442e-a141-35c1d9ef8ed9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_ed8c23c1-4317-4598-b1f8-d1af53be115d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_ed8c23c1-4317-4598-b1f8-d1af53be115d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_60c824f4-a84b-4b47-82fe-95562be1ef49" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_60c824f4-a84b-4b47-82fe-95562be1ef49" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_f1251dea-0112-41d4-a719-ce2e2df3c490" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_f1251dea-0112-41d4-a719-ce2e2df3c490" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_45182b05-215b-40e4-9274-b6ca7746436d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_f1251dea-0112-41d4-a719-ce2e2df3c490" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_45182b05-215b-40e4-9274-b6ca7746436d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_b1d1d8bf-bcb4-49ae-9d05-cbbb1d195608" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_f1251dea-0112-41d4-a719-ce2e2df3c490" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_b1d1d8bf-bcb4-49ae-9d05-cbbb1d195608" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_30687364-2343-4048-8395-033830f7d7e4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_f1251dea-0112-41d4-a719-ce2e2df3c490" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_30687364-2343-4048-8395-033830f7d7e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_aea8509f-5698-4422-bc54-3a686b3e42ad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingAssetsAbstract_f1251dea-0112-41d4-a719-ce2e2df3c490" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_aea8509f-5698-4422-bc54-3a686b3e42ad" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_f02a9a49-2965-4903-a48e-c973152b5553" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_f02a9a49-2965-4903-a48e-c973152b5553" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_IncreaseDecreaseInAccountsPayableAndIncomeTaxesPayable_74002764-96bc-454f-95df-29e2a287944e" xlink:href="odc-20210131.xsd#odc_IncreaseDecreaseInAccountsPayableAndIncomeTaxesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_f02a9a49-2965-4903-a48e-c973152b5553" xlink:to="loc_odc_IncreaseDecreaseInAccountsPayableAndIncomeTaxesPayable_74002764-96bc-454f-95df-29e2a287944e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_28509605-45e1-481a-b4a8-dfa928de87b4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_f02a9a49-2965-4903-a48e-c973152b5553" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_28509605-45e1-481a-b4a8-dfa928de87b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredCompensation_c466b3f8-919e-4e7e-a9bf-b30cd23b26d3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_f02a9a49-2965-4903-a48e-c973152b5553" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredCompensation_c466b3f8-919e-4e7e-a9bf-b30cd23b26d3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations_411c138f-8b3c-467e-b692-a45ea4ed0d28" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_f02a9a49-2965-4903-a48e-c973152b5553" xlink:to="loc_us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations_411c138f-8b3c-467e-b692-a45ea4ed0d28" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_c6cb556c-5f8f-4d4b-b163-9f9e167b91e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingLiabilitiesAbstract_f02a9a49-2965-4903-a48e-c973152b5553" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_c6cb556c-5f8f-4d4b-b163-9f9e167b91e6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_473ebeef-38c6-49c0-996e-eee23a80e15e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9c1e7d80-6d80-4c40-9aad-877a24f25872" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_473ebeef-38c6-49c0-996e-eee23a80e15e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_5a958fd3-bde6-4cc0-a40b-1a4eb9edac83" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_04ed7112-bd2a-4a15-9317-59b0e6a6a153" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_5a958fd3-bde6-4cc0-a40b-1a4eb9edac83" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_a4c9f171-dcf6-42a9-9b7a-68abb4b97364" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c5c17b9a-d7e8-44a4-842b-3c0388a82c2b" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_a4c9f171-dcf6-42a9-9b7a-68abb4b97364" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_e5d365ee-02cd-4a65-91c1-b6836137e0da" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_a4c9f171-dcf6-42a9-9b7a-68abb4b97364" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_e5d365ee-02cd-4a65-91c1-b6836137e0da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_585b3c01-4598-45ae-b724-990a87e01008" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_a4c9f171-dcf6-42a9-9b7a-68abb4b97364" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_585b3c01-4598-45ae-b724-990a87e01008" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireShortTermInvestments_f5f22f01-3d51-4240-ae06-613b091771d7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquireShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_a4c9f171-dcf6-42a9-9b7a-68abb4b97364" xlink:to="loc_us-gaap_PaymentsToAcquireShortTermInvestments_f5f22f01-3d51-4240-ae06-613b091771d7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_7db9579c-24c2-4188-8135-ef75a3d3f560" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_a4c9f171-dcf6-42a9-9b7a-68abb4b97364" xlink:to="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_7db9579c-24c2-4188-8135-ef75a3d3f560" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_1b5a96e3-ba12-43e9-b7ed-f4e0d828dbe5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_a4c9f171-dcf6-42a9-9b7a-68abb4b97364" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_1b5a96e3-ba12-43e9-b7ed-f4e0d828dbe5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_95faa838-7b7e-4f78-9cce-28f17a93ab08" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c5c17b9a-d7e8-44a4-842b-3c0388a82c2b" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_95faa838-7b7e-4f78-9cce-28f17a93ab08" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfSeniorDebt_ccd14841-ba3b-4f50-abca-2f5339f7a968" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RepaymentsOfSeniorDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_95faa838-7b7e-4f78-9cce-28f17a93ab08" xlink:to="loc_us-gaap_RepaymentsOfSeniorDebt_ccd14841-ba3b-4f50-abca-2f5339f7a968" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_ca2596b1-c13e-4451-941d-2bfb7508c07c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_95faa838-7b7e-4f78-9cce-28f17a93ab08" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_ca2596b1-c13e-4451-941d-2bfb7508c07c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_d46a7aac-db55-4e54-8afd-c61dbec8c631" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_95faa838-7b7e-4f78-9cce-28f17a93ab08" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_d46a7aac-db55-4e54-8afd-c61dbec8c631" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsToMinorityShareholders_34dda092-cb8e-47f1-97c7-6f82774ad4bb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromPaymentsToMinorityShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_95faa838-7b7e-4f78-9cce-28f17a93ab08" xlink:to="loc_us-gaap_ProceedsFromPaymentsToMinorityShareholders_34dda092-cb8e-47f1-97c7-6f82774ad4bb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f10779bb-007e-4b19-954f-96e0c5181d71" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_95faa838-7b7e-4f78-9cce-28f17a93ab08" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f10779bb-007e-4b19-954f-96e0c5181d71" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_4fa126e7-06d0-4bb8-bffa-7eaf66adbd72" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c5c17b9a-d7e8-44a4-842b-3c0388a82c2b" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_4fa126e7-06d0-4bb8-bffa-7eaf66adbd72" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_203e943c-5280-46e0-a975-ad57095d9a74" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c5c17b9a-d7e8-44a4-842b-3c0388a82c2b" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_203e943c-5280-46e0-a975-ad57095d9a74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7677a535-1588-47db-911e-dad7c264e3ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c5c17b9a-d7e8-44a4-842b-3c0388a82c2b" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7677a535-1588-47db-911e-dad7c264e3ca" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_a90af440-72a6-462c-a9c8-c97680de9cbd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_58ee8364-c8c3-466f-977a-c39b251136e9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c5c17b9a-d7e8-44a4-842b-3c0388a82c2b" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_58ee8364-c8c3-466f-977a-c39b251136e9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_ed98f20b-38ee-4df7-889a-fb9213c5b41f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_58ee8364-c8c3-466f-977a-c39b251136e9" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_ed98f20b-38ee-4df7-889a-fb9213c5b41f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_8ffe6664-86e9-469d-a59b-73aaf0e39495" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_58ee8364-c8c3-466f-977a-c39b251136e9" xlink:to="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_8ffe6664-86e9-469d-a59b-73aaf0e39495" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_97942e3b-ce12-4c2a-8d89-eaf02c4a1bdf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_c5c17b9a-d7e8-44a4-842b-3c0388a82c2b" xlink:to="loc_us-gaap_StatementTable_97942e3b-ce12-4c2a-8d89-eaf02c4a1bdf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_bc9fb3fa-63a3-48ba-9025-36badb549857" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_97942e3b-ce12-4c2a-8d89-eaf02c4a1bdf" xlink:to="loc_srt_StatementScenarioAxis_bc9fb3fa-63a3-48ba-9025-36badb549857" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_bc9fb3fa-63a3-48ba-9025-36badb549857_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_bc9fb3fa-63a3-48ba-9025-36badb549857" xlink:to="loc_srt_ScenarioUnspecifiedDomain_bc9fb3fa-63a3-48ba-9025-36badb549857_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_9e061fbd-e933-4ae9-916c-192b0236d782" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_bc9fb3fa-63a3-48ba-9025-36badb549857" xlink:to="loc_srt_ScenarioUnspecifiedDomain_9e061fbd-e933-4ae9-916c-192b0236d782" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/BasisofStatementPresentation" xlink:type="simple" xlink:href="odc-20210131.xsd#BasisofStatementPresentation"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/BasisofStatementPresentation" xlink:type="extended" id="i2019309e9d2e4e79b2bc00c8d734c49b_BasisofStatementPresentation"/>
  <link:roleRef roleURI="http://www.oildri.com/role/BasisofStatementPresentationLevel2Policies" xlink:type="simple" xlink:href="odc-20210131.xsd#BasisofStatementPresentationLevel2Policies"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/BasisofStatementPresentationLevel2Policies" xlink:type="extended" id="iddf93a275fba4e7695033f8497ae14c3_BasisofStatementPresentationLevel2Policies"/>
  <link:roleRef roleURI="http://www.oildri.com/role/BasisofStatementPresentationRevenueRecognitionDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#BasisofStatementPresentationRevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/BasisofStatementPresentationRevenueRecognitionDetails" xlink:type="extended" id="i18acccafdb884c3288b9fb7d22088bb2_BasisofStatementPresentationRevenueRecognitionDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueArrangementLineItems_6ca5cc3e-f074-489e-8af0-7cb97797fca6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRevenueArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueCurrent_0ead7752-a3d6-4179-900d-9bb56e863bd8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRevenueCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredRevenueArrangementLineItems_6ca5cc3e-f074-489e-8af0-7cb97797fca6" xlink:to="loc_us-gaap_DeferredRevenueCurrent_0ead7752-a3d6-4179-900d-9bb56e863bd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueRevenueRecognized1_4dc8b966-1d25-4624-b8e2-45578ad959c7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRevenueRevenueRecognized1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredRevenueArrangementLineItems_6ca5cc3e-f074-489e-8af0-7cb97797fca6" xlink:to="loc_us-gaap_DeferredRevenueRevenueRecognized1_4dc8b966-1d25-4624-b8e2-45578ad959c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueArrangementByTypeTable_a2dcd34d-b670-4277-ac7a-4aa78b62c18d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRevenueArrangementByTypeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredRevenueArrangementLineItems_6ca5cc3e-f074-489e-8af0-7cb97797fca6" xlink:to="loc_us-gaap_DeferredRevenueArrangementByTypeTable_a2dcd34d-b670-4277-ac7a-4aa78b62c18d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeAxis_d97c0e9e-c0fc-4eb1-99fb-16817ecee561" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DeferredRevenueArrangementByTypeTable_a2dcd34d-b670-4277-ac7a-4aa78b62c18d" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeAxis_d97c0e9e-c0fc-4eb1-99fb-16817ecee561" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeDomain_d97c0e9e-c0fc-4eb1-99fb-16817ecee561_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeAxis_d97c0e9e-c0fc-4eb1-99fb-16817ecee561" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeDomain_d97c0e9e-c0fc-4eb1-99fb-16817ecee561_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeDomain_6bb803d6-48e4-4fd4-8596-f11bd652e863" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeAxis_d97c0e9e-c0fc-4eb1-99fb-16817ecee561" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeDomain_6bb803d6-48e4-4fd4-8596-f11bd652e863" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UpFrontPaymentArrangementMember_79d7712b-c61b-4cc2-86e2-2a442140c6aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UpFrontPaymentArrangementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeDomain_6bb803d6-48e4-4fd4-8596-f11bd652e863" xlink:to="loc_us-gaap_UpFrontPaymentArrangementMember_79d7712b-c61b-4cc2-86e2-2a442140c6aa" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/BasisofStatementPresentationOtherNoncurrentLiabilities" xlink:type="simple" xlink:href="odc-20210131.xsd#BasisofStatementPresentationOtherNoncurrentLiabilities"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/BasisofStatementPresentationOtherNoncurrentLiabilities" xlink:type="extended" id="i3532b475c8ce4cb198cf3e29fa1c9975_BasisofStatementPresentationOtherNoncurrentLiabilities"/>
  <link:roleRef roleURI="http://www.oildri.com/role/NewAccountingPronouncements" xlink:type="simple" xlink:href="odc-20210131.xsd#NewAccountingPronouncements"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/NewAccountingPronouncements" xlink:type="extended" id="ic97668c3d2bb49d1800aadf45bf5667a_NewAccountingPronouncements"/>
  <link:roleRef roleURI="http://www.oildri.com/role/NewAccountingPronouncementsAdjustmentforNewAccountingPronouncementDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#NewAccountingPronouncementsAdjustmentforNewAccountingPronouncementDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/NewAccountingPronouncementsAdjustmentforNewAccountingPronouncementDetails" xlink:type="extended" id="i8752d2d4e82947c898104d948d6b4fb4_NewAccountingPronouncementsAdjustmentforNewAccountingPronouncementDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_b1307db3-31a3-4356-8073-3cdbb8e52b1b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_a083b397-d487-425b-a9fc-342258d95292" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_b1307db3-31a3-4356-8073-3cdbb8e52b1b" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_a083b397-d487-425b-a9fc-342258d95292" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_10e49424-3458-4257-a065-d8a811b1f384" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_a083b397-d487-425b-a9fc-342258d95292" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_10e49424-3458-4257-a065-d8a811b1f384" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_10e49424-3458-4257-a065-d8a811b1f384_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfAdoptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_10e49424-3458-4257-a065-d8a811b1f384" xlink:to="loc_us-gaap_TypeOfAdoptionMember_10e49424-3458-4257-a065-d8a811b1f384_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_246f5422-7aac-47a5-90ad-41667bf38608" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfAdoptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_10e49424-3458-4257-a065-d8a811b1f384" xlink:to="loc_us-gaap_TypeOfAdoptionMember_246f5422-7aac-47a5-90ad-41667bf38608" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/Inventories" xlink:type="simple" xlink:href="odc-20210131.xsd#Inventories"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/Inventories" xlink:type="extended" id="i5196e45b923d4ce8ae8e04b1f45b592f_Inventories"/>
  <link:roleRef roleURI="http://www.oildri.com/role/InventoriesLevel2Policies" xlink:type="simple" xlink:href="odc-20210131.xsd#InventoriesLevel2Policies"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/InventoriesLevel2Policies" xlink:type="extended" id="ib12469cd97b145c8b40b825884aa7b23_InventoriesLevel2Policies"/>
  <link:roleRef roleURI="http://www.oildri.com/role/InventoriesLevel3Tables" xlink:type="simple" xlink:href="odc-20210131.xsd#InventoriesLevel3Tables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/InventoriesLevel3Tables" xlink:type="extended" id="ic98972e74b894affb2bf02b06757b849_InventoriesLevel3Tables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/InventoriesDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#InventoriesDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/InventoriesDetails" xlink:type="extended" id="i671b582fe5d344ba82a23170baf7610a_InventoriesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryLineItems_aaaa8696-e6cf-4d8f-9442-14e402a540f4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoods_43ad61c2-d0c6-48d1-9c82-b44f31792898" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryFinishedGoods"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_aaaa8696-e6cf-4d8f-9442-14e402a540f4" xlink:to="loc_us-gaap_InventoryFinishedGoods_43ad61c2-d0c6-48d1-9c82-b44f31792898" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_PackagingInventory_4c3517cd-4f7b-4d41-bdf0-caf3c7a4f240" xlink:href="odc-20210131.xsd#odc_PackagingInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_aaaa8696-e6cf-4d8f-9442-14e402a540f4" xlink:to="loc_odc_PackagingInventory_4c3517cd-4f7b-4d41-bdf0-caf3c7a4f240" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInventory_6e3d293f-ed25-402a-b38e-f7124f433415" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_aaaa8696-e6cf-4d8f-9442-14e402a540f4" xlink:to="loc_us-gaap_OtherInventory_6e3d293f-ed25-402a-b38e-f7124f433415" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_dc337074-60fd-4e8b-9d04-f6c026ac65bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_aaaa8696-e6cf-4d8f-9442-14e402a540f4" xlink:to="loc_us-gaap_InventoryNet_dc337074-60fd-4e8b-9d04-f6c026ac65bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryCurrentTable_32c2e621-55b0-4231-a4f4-ae87a7c93c9f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryCurrentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InventoryLineItems_aaaa8696-e6cf-4d8f-9442-14e402a540f4" xlink:to="loc_us-gaap_InventoryCurrentTable_32c2e621-55b0-4231-a4f4-ae87a7c93c9f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryAxis_7020f48a-7cec-4db3-b1e8-9e4878fd8e61" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesInventoryAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_32c2e621-55b0-4231-a4f4-ae87a7c93c9f" xlink:to="loc_us-gaap_PublicUtilitiesInventoryAxis_7020f48a-7cec-4db3-b1e8-9e4878fd8e61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_7020f48a-7cec-4db3-b1e8-9e4878fd8e61_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_7020f48a-7cec-4db3-b1e8-9e4878fd8e61" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_7020f48a-7cec-4db3-b1e8-9e4878fd8e61_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_bf949415-cfd3-4728-b536-8ac3562e8333" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_7020f48a-7cec-4db3-b1e8-9e4878fd8e61" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_bf949415-cfd3-4728-b536-8ac3562e8333" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/InventoriesNarrativeDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#InventoriesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/InventoriesNarrativeDetails" xlink:type="extended" id="i9f98cd55183742ffb7c9b40f70462287_InventoriesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryLineItems_a1a6943d-7ce3-4c9d-9a0a-95b3e7a65917" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryValuationReserves_4d0b87bc-9640-4644-a6af-f485e055288f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryValuationReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_a1a6943d-7ce3-4c9d-9a0a-95b3e7a65917" xlink:to="loc_us-gaap_InventoryValuationReserves_4d0b87bc-9640-4644-a6af-f485e055288f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryCurrentTable_6e748087-9802-4121-b7d2-baa2dbf27344" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryCurrentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InventoryLineItems_a1a6943d-7ce3-4c9d-9a0a-95b3e7a65917" xlink:to="loc_us-gaap_InventoryCurrentTable_6e748087-9802-4121-b7d2-baa2dbf27344" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryAxis_745ca3a3-208f-4285-abbe-d4245d00ad01" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesInventoryAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_6e748087-9802-4121-b7d2-baa2dbf27344" xlink:to="loc_us-gaap_PublicUtilitiesInventoryAxis_745ca3a3-208f-4285-abbe-d4245d00ad01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_745ca3a3-208f-4285-abbe-d4245d00ad01_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_745ca3a3-208f-4285-abbe-d4245d00ad01" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_745ca3a3-208f-4285-abbe-d4245d00ad01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_28457204-a885-469c-8c46-6a4e1ca44c01" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_745ca3a3-208f-4285-abbe-d4245d00ad01" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_28457204-a885-469c-8c46-6a4e1ca44c01" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/FairValueMeasurements" xlink:type="simple" xlink:href="odc-20210131.xsd#FairValueMeasurements"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/FairValueMeasurements" xlink:type="extended" id="ib58f81994cf844c2b776204f35bf29d3_FairValueMeasurements"/>
  <link:roleRef roleURI="http://www.oildri.com/role/FairValueMeasurementsFairValueMeasurementsPolicies" xlink:type="simple" xlink:href="odc-20210131.xsd#FairValueMeasurementsFairValueMeasurementsPolicies"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/FairValueMeasurementsFairValueMeasurementsPolicies" xlink:type="extended" id="ib985c25e698a40d88ac482b148690c22_FairValueMeasurementsFairValueMeasurementsPolicies"/>
  <link:roleRef roleURI="http://www.oildri.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#FairValueMeasurementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended" id="id3789fea45eb41dba7bb4fb1798c118f_FairValueMeasurementsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1c623db7-0a0f-4e4e-969a-e8d639943b39" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsAtCarryingValue_da1b0260-8e85-488e-9928-0fc96f25084a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1c623db7-0a0f-4e4e-969a-e8d639943b39" xlink:to="loc_us-gaap_CashEquivalentsAtCarryingValue_da1b0260-8e85-488e-9928-0fc96f25084a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_b8d650b8-2ef7-411b-93c5-9a2483ce317f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1c623db7-0a0f-4e4e-969a-e8d639943b39" xlink:to="loc_us-gaap_LongTermDebtFairValue_b8d650b8-2ef7-411b-93c5-9a2483ce317f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1ec0bce0-3151-4fc5-aed7-af6ee09d9bde" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1c623db7-0a0f-4e4e-969a-e8d639943b39" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1ec0bce0-3151-4fc5-aed7-af6ee09d9bde" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7c6d90a3-59fa-4f6d-8bce-fa0bfed13b73" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_1ec0bce0-3151-4fc5-aed7-af6ee09d9bde" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7c6d90a3-59fa-4f6d-8bce-fa0bfed13b73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7c6d90a3-59fa-4f6d-8bce-fa0bfed13b73_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7c6d90a3-59fa-4f6d-8bce-fa0bfed13b73" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7c6d90a3-59fa-4f6d-8bce-fa0bfed13b73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7c2fec90-ca4f-434c-a4ed-0fa3bf8a8fc8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7c6d90a3-59fa-4f6d-8bce-fa0bfed13b73" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7c2fec90-ca4f-434c-a4ed-0fa3bf8a8fc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_b8ac5940-5b8e-4369-bfbd-e00b701def6a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7c2fec90-ca4f-434c-a4ed-0fa3bf8a8fc8" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_b8ac5940-5b8e-4369-bfbd-e00b701def6a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_5d396761-7962-4826-b0c1-5dbe529b8640" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7c2fec90-ca4f-434c-a4ed-0fa3bf8a8fc8" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_5d396761-7962-4826-b0c1-5dbe529b8640" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/GoodwillandOtherIntangiblesNotes" xlink:type="simple" xlink:href="odc-20210131.xsd#GoodwillandOtherIntangiblesNotes"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/GoodwillandOtherIntangiblesNotes" xlink:type="extended" id="id604a419b5454166b62600ecbb2ecb76_GoodwillandOtherIntangiblesNotes"/>
  <link:roleRef roleURI="http://www.oildri.com/role/GoodwillandOtherIntangiblesTables" xlink:type="simple" xlink:href="odc-20210131.xsd#GoodwillandOtherIntangiblesTables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/GoodwillandOtherIntangiblesTables" xlink:type="extended" id="ia46c1a5c8f0645b8ae295efbcbeb9066_GoodwillandOtherIntangiblesTables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/GoodwillandOtherIntangiblesDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#GoodwillandOtherIntangiblesDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/GoodwillandOtherIntangiblesDetails" xlink:type="extended" id="id337c3e4b6214e0dbe4f035419ecc799_GoodwillandOtherIntangiblesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5cadc1b1-b61f-4227-8ca5-64e3773485f6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4b7c668b-dd6e-4937-8eb1-09d4904f29e9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5cadc1b1-b61f-4227-8ca5-64e3773485f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4b7c668b-dd6e-4937-8eb1-09d4904f29e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_a1aa4613-6693-4435-b3c4-f9745e4f4d81" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5cadc1b1-b61f-4227-8ca5-64e3773485f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_a1aa4613-6693-4435-b3c4-f9745e4f4d81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7dab0ba8-4980-4b6f-b3cc-e4769af74462" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5cadc1b1-b61f-4227-8ca5-64e3773485f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7dab0ba8-4980-4b6f-b3cc-e4769af74462" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_cc11c9fd-c69b-4778-a415-9919701f098a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5cadc1b1-b61f-4227-8ca5-64e3773485f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_cc11c9fd-c69b-4778-a415-9919701f098a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_5d266100-2376-48bb-b54d-e196f64475af" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5cadc1b1-b61f-4227-8ca5-64e3773485f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_5d266100-2376-48bb-b54d-e196f64475af" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_3674f865-d4de-4672-9fc9-c16e5cf0a8e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5cadc1b1-b61f-4227-8ca5-64e3773485f6" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_3674f865-d4de-4672-9fc9-c16e5cf0a8e6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_47bc74fb-8ae6-44b0-aa0f-df70cd0e6da1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_3674f865-d4de-4672-9fc9-c16e5cf0a8e6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_47bc74fb-8ae6-44b0-aa0f-df70cd0e6da1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_47bc74fb-8ae6-44b0-aa0f-df70cd0e6da1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_47bc74fb-8ae6-44b0-aa0f-df70cd0e6da1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_47bc74fb-8ae6-44b0-aa0f-df70cd0e6da1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7df88dde-3479-462c-9f0c-137d330cd81e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_47bc74fb-8ae6-44b0-aa0f-df70cd0e6da1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7df88dde-3479-462c-9f0c-137d330cd81e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/GoodwillandOtherIntangiblesNarrativeDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#GoodwillandOtherIntangiblesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/GoodwillandOtherIntangiblesNarrativeDetails" xlink:type="extended" id="i6aabaed43b7d4e189042c455723d6456_GoodwillandOtherIntangiblesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_4fff9f9b-3068-4d6f-aeb1-6a318a1ea239" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_5cd45b7e-a178-4e9c-b255-de3610ce7f40" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_4fff9f9b-3068-4d6f-aeb1-6a318a1ea239" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_5cd45b7e-a178-4e9c-b255-de3610ce7f40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_1986298e-748a-43e6-8cc6-aee02f31e8fd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_4fff9f9b-3068-4d6f-aeb1-6a318a1ea239" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_1986298e-748a-43e6-8cc6-aee02f31e8fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_467fc277-7b8c-4d07-934a-a635873ae6f4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_4fff9f9b-3068-4d6f-aeb1-6a318a1ea239" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_467fc277-7b8c-4d07-934a-a635873ae6f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_203e4b3e-92d8-4aaa-a1f7-008af7fcb3a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_4fff9f9b-3068-4d6f-aeb1-6a318a1ea239" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_203e4b3e-92d8-4aaa-a1f7-008af7fcb3a5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_f7424587-3cb4-4644-8c47-974902b03551" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_4fff9f9b-3068-4d6f-aeb1-6a318a1ea239" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_f7424587-3cb4-4644-8c47-974902b03551" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_7923ad6a-83ae-42ef-812e-009b417eddbc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_f7424587-3cb4-4644-8c47-974902b03551" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_7923ad6a-83ae-42ef-812e-009b417eddbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7923ad6a-83ae-42ef-812e-009b417eddbc_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_7923ad6a-83ae-42ef-812e-009b417eddbc" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7923ad6a-83ae-42ef-812e-009b417eddbc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4390a76e-c0f4-4d93-9d1c-971041b06c16" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_7923ad6a-83ae-42ef-812e-009b417eddbc" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4390a76e-c0f4-4d93-9d1c-971041b06c16" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/AccruedExpenses" xlink:type="simple" xlink:href="odc-20210131.xsd#AccruedExpenses"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/AccruedExpenses" xlink:type="extended" id="i7225f0a1e62845abbe043bcb42a7c12f_AccruedExpenses"/>
  <link:roleRef roleURI="http://www.oildri.com/role/AccruedExpensesTables" xlink:type="simple" xlink:href="odc-20210131.xsd#AccruedExpensesTables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/AccruedExpensesTables" xlink:type="extended" id="ib5423e0ed1a1458496820d4469211183_AccruedExpensesTables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/AccruedExpensesDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#AccruedExpensesDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/AccruedExpensesDetails" xlink:type="extended" id="i5081da2e10f04398902b1a8e5ae2af83_AccruedExpensesDetails"/>
  <link:roleRef roleURI="http://www.oildri.com/role/CommitmentandContingencies" xlink:type="simple" xlink:href="odc-20210131.xsd#CommitmentandContingencies"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/CommitmentandContingencies" xlink:type="extended" id="i5989fdeae2e5407ea8ef4cb79e656b5c_CommitmentandContingencies"/>
  <link:roleRef roleURI="http://www.oildri.com/role/CommitmentandContingenciesTables" xlink:type="simple" xlink:href="odc-20210131.xsd#CommitmentandContingenciesTables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/CommitmentandContingenciesTables" xlink:type="extended" id="ibc9c23d65a954e8faa343278462d5ec5_CommitmentandContingenciesTables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/CommitmentandContingenciesDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#CommitmentandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/CommitmentandContingenciesDetails" xlink:type="extended" id="iba7cf92dae4f4d0d93ea0b35de38599e_CommitmentandContingenciesDetails"/>
  <link:roleRef roleURI="http://www.oildri.com/role/LeasesNotes" xlink:type="simple" xlink:href="odc-20210131.xsd#LeasesNotes"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/LeasesNotes" xlink:type="extended" id="ic9481858b6de4e3cbe0ed503ca8f649c_LeasesNotes"/>
  <link:roleRef roleURI="http://www.oildri.com/role/LeasesTables" xlink:type="simple" xlink:href="odc-20210131.xsd#LeasesTables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/LeasesTables" xlink:type="extended" id="i25a4d87084d94022b3b156d51bc7e20b_LeasesTables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/LeasesDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#LeasesDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/LeasesDetails" xlink:type="extended" id="id0a0e8ba1a0a4d4eab6cefc89bc21d48_LeasesDetails"/>
  <link:roleRef roleURI="http://www.oildri.com/role/PensionandOtherPostretirementBenefits" xlink:type="simple" xlink:href="odc-20210131.xsd#PensionandOtherPostretirementBenefits"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/PensionandOtherPostretirementBenefits" xlink:type="extended" id="ic9d44a7341cd4a298bfbad23121e562d_PensionandOtherPostretirementBenefits"/>
  <link:roleRef roleURI="http://www.oildri.com/role/PensionandOtherPostretirementBenefitsTables" xlink:type="simple" xlink:href="odc-20210131.xsd#PensionandOtherPostretirementBenefitsTables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/PensionandOtherPostretirementBenefitsTables" xlink:type="extended" id="ib814565ccb0e4bd6b4b07cd7506b34fc_PensionandOtherPostretirementBenefitsTables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/PensionandOtherPostretirementBenefitsDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#PensionandOtherPostretirementBenefitsDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/PensionandOtherPostretirementBenefitsDetails" xlink:type="extended" id="i9a82d0f3a3b74b4698bbbfe3c527f4f6_PensionandOtherPostretirementBenefitsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_55f7a349-a1a7-4b68-a52e-62e4d1aded35" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_79cc5983-25e7-4a03-bfe9-ad635abfaed5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_55f7a349-a1a7-4b68-a52e-62e4d1aded35" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_79cc5983-25e7-4a03-bfe9-ad635abfaed5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_82b03926-09eb-4193-915d-001f812e8054" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_55f7a349-a1a7-4b68-a52e-62e4d1aded35" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_82b03926-09eb-4193-915d-001f812e8054" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_b3a8de05-28e7-4f12-a961-d0482f5e3fa2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_55f7a349-a1a7-4b68-a52e-62e4d1aded35" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_b3a8de05-28e7-4f12-a961-d0482f5e3fa2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_d207785e-5239-45ed-9ad2-acce3189fdfd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_55f7a349-a1a7-4b68-a52e-62e4d1aded35" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_d207785e-5239-45ed-9ad2-acce3189fdfd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_7d46636e-b881-4a6a-8ad8-c27cbfc1dc00" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_55f7a349-a1a7-4b68-a52e-62e4d1aded35" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_7d46636e-b881-4a6a-8ad8-c27cbfc1dc00" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_4a65776d-3dbd-4c44-973b-eb7aaedcd80c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_55f7a349-a1a7-4b68-a52e-62e4d1aded35" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_4a65776d-3dbd-4c44-973b-eb7aaedcd80c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_93666ce2-9f29-4558-b2e9-b9771499b72e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_55f7a349-a1a7-4b68-a52e-62e4d1aded35" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_93666ce2-9f29-4558-b2e9-b9771499b72e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_551e8b74-1de8-4982-93e6-0db48c6e57c5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_93666ce2-9f29-4558-b2e9-b9771499b72e" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_551e8b74-1de8-4982-93e6-0db48c6e57c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_551e8b74-1de8-4982-93e6-0db48c6e57c5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_551e8b74-1de8-4982-93e6-0db48c6e57c5" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_551e8b74-1de8-4982-93e6-0db48c6e57c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_534d7663-2939-4d29-8b31-f9d515a5aad2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_551e8b74-1de8-4982-93e6-0db48c6e57c5" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_534d7663-2939-4d29-8b31-f9d515a5aad2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_0b4f1190-22e4-4494-9639-396822a22dbf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_534d7663-2939-4d29-8b31-f9d515a5aad2" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_0b4f1190-22e4-4494-9639-396822a22dbf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_1888874e-6d67-4503-b24f-6a2b3006a2e2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_534d7663-2939-4d29-8b31-f9d515a5aad2" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_1888874e-6d67-4503-b24f-6a2b3006a2e2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/PensionandOtherPostretirementBenefitsAssumptionsDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#PensionandOtherPostretirementBenefitsAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/PensionandOtherPostretirementBenefitsAssumptionsDetails" xlink:type="extended" id="ia29f0852d3cb4e2ca5586b6de3e9112d_PensionandOtherPostretirementBenefitsAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_6ccb4c12-77ef-48c7-82ad-7a3edbb7b8a7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_49af6837-5fff-4c4e-8f1f-9a3b731c1f91" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_6ccb4c12-77ef-48c7-82ad-7a3edbb7b8a7" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_49af6837-5fff-4c4e-8f1f-9a3b731c1f91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_a459b066-4427-4839-8e8e-28e08650f38e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_6ccb4c12-77ef-48c7-82ad-7a3edbb7b8a7" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_a459b066-4427-4839-8e8e-28e08650f38e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_36d63f89-0b0a-4311-a1e1-9bbe9d294219" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_6ccb4c12-77ef-48c7-82ad-7a3edbb7b8a7" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_36d63f89-0b0a-4311-a1e1-9bbe9d294219" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_f3c86a4e-5cc7-48aa-98d0-ae37b94993b1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_6ccb4c12-77ef-48c7-82ad-7a3edbb7b8a7" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_f3c86a4e-5cc7-48aa-98d0-ae37b94993b1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_48c3bf71-6af9-4864-b604-47e860f117f2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_f3c86a4e-5cc7-48aa-98d0-ae37b94993b1" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_48c3bf71-6af9-4864-b604-47e860f117f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_48c3bf71-6af9-4864-b604-47e860f117f2_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_48c3bf71-6af9-4864-b604-47e860f117f2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_48c3bf71-6af9-4864-b604-47e860f117f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1169376c-5dfa-4f8c-afa1-c1c159c480a2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_48c3bf71-6af9-4864-b604-47e860f117f2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1169376c-5dfa-4f8c-afa1-c1c159c480a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_f6d5f4cb-3c61-4e3e-b3f6-8d06066f3662" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_1169376c-5dfa-4f8c-afa1-c1c159c480a2" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_f6d5f4cb-3c61-4e3e-b3f6-8d06066f3662" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_d1af0623-abf9-4e73-9294-fbe9983cd5fc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_1169376c-5dfa-4f8c-afa1-c1c159c480a2" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_d1af0623-abf9-4e73-9294-fbe9983cd5fc" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/PensionandOtherPostretirementBenefitsNarrativeDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#PensionandOtherPostretirementBenefitsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/PensionandOtherPostretirementBenefitsNarrativeDetails" xlink:type="extended" id="i080a9788c03d412d80fedf0571cb6232_PensionandOtherPostretirementBenefitsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax_eef4a6b6-53e6-4981-80de-2932b7f77173" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax_eef4a6b6-53e6-4981-80de-2932b7f77173" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax_5804986f-64fc-4dd0-bb39-d4f589fd7b4d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax_5804986f-64fc-4dd0-bb39-d4f589fd7b4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_DefinedBenefitPlanVoluntaryContribution_3d4f002e-438e-4826-ad33-e0efef809240" xlink:href="odc-20210131.xsd#odc_DefinedBenefitPlanVoluntaryContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:to="loc_odc_DefinedBenefitPlanVoluntaryContribution_3d4f002e-438e-4826-ad33-e0efef809240" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_a686b5a2-12a6-4b59-85f6-2a0b6d09d945" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsRemainderOfFiscalYear_a686b5a2-12a6-4b59-85f6-2a0b6d09d945" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_e51e4c51-2234-4a68-b5fe-e046bf569c15" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:to="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_e51e4c51-2234-4a68-b5fe-e046bf569c15" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_e51b0012-6987-4658-bdcb-a1af69cb6f14" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:to="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_e51b0012-6987-4658-bdcb-a1af69cb6f14" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_50e23d5b-fe2b-4357-9920-7c39c4eac227" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:to="loc_us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate_50e23d5b-fe2b-4357-9920-7c39c4eac227" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCurtailments_a047e0e7-513e-4b92-b0cf-917e96434deb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanCurtailments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:to="loc_us-gaap_DefinedBenefitPlanCurtailments_a047e0e7-513e-4b92-b0cf-917e96434deb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_bb5d3e4f-5d65-47d8-a3ca-e04665f4150a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aab1a9a6-b0ec-420e-9d3c-1d3f5ff7902c" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_bb5d3e4f-5d65-47d8-a3ca-e04665f4150a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_9de240b2-4bef-4038-9ed9-ef4f8bfad2ab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_bb5d3e4f-5d65-47d8-a3ca-e04665f4150a" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_9de240b2-4bef-4038-9ed9-ef4f8bfad2ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_9de240b2-4bef-4038-9ed9-ef4f8bfad2ab_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_9de240b2-4bef-4038-9ed9-ef4f8bfad2ab" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_9de240b2-4bef-4038-9ed9-ef4f8bfad2ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5f5d0506-d7cf-4be3-830d-65c64216b959" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_9de240b2-4bef-4038-9ed9-ef4f8bfad2ab" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5f5d0506-d7cf-4be3-830d-65c64216b959" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_41be3720-4da9-4eb3-9ef0-3ad39cc551b1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5f5d0506-d7cf-4be3-830d-65c64216b959" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_41be3720-4da9-4eb3-9ef0-3ad39cc551b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6e528046-5148-4ba8-9cf3-50cb169f2093" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5f5d0506-d7cf-4be3-830d-65c64216b959" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6e528046-5148-4ba8-9cf3-50cb169f2093" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_839b2643-992f-489e-96f8-fa1dcd72047d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5f5d0506-d7cf-4be3-830d-65c64216b959" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_839b2643-992f-489e-96f8-fa1dcd72047d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/OperatingSegments" xlink:type="simple" xlink:href="odc-20210131.xsd#OperatingSegments"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/OperatingSegments" xlink:type="extended" id="i828cf44f57e3404e9f128ad0df985629_OperatingSegments"/>
  <link:roleRef roleURI="http://www.oildri.com/role/OperatingSegmentsLevel2Policies" xlink:type="simple" xlink:href="odc-20210131.xsd#OperatingSegmentsLevel2Policies"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/OperatingSegmentsLevel2Policies" xlink:type="extended" id="i6fcc0e9148ef4c62a34a91ac2c0eea9d_OperatingSegmentsLevel2Policies"/>
  <link:roleRef roleURI="http://www.oildri.com/role/OperatingSegmentsTables" xlink:type="simple" xlink:href="odc-20210131.xsd#OperatingSegmentsTables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/OperatingSegmentsTables" xlink:type="extended" id="ib2bcbf4a476a414a80f054d02808e4ee_OperatingSegmentsTables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/OperatingSegmentsDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#OperatingSegmentsDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/OperatingSegmentsDisaggregationofRevenueDetails" xlink:type="extended" id="i2894337afbdb4ed1a4074f1bd9f62c94_OperatingSegmentsDisaggregationofRevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_f5a742e8-0128-4379-965a-59559dee6ee2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_aa15def6-3d30-4f62-a44a-5e31dc0b4337" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_f5a742e8-0128-4379-965a-59559dee6ee2" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_aa15def6-3d30-4f62-a44a-5e31dc0b4337" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_7fdd2d4c-f564-450f-a51b-3dc5723cd210" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_f5a742e8-0128-4379-965a-59559dee6ee2" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_7fdd2d4c-f564-450f-a51b-3dc5723cd210" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_863e9319-1475-4ec3-b5a1-46b1a0cc170e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_7fdd2d4c-f564-450f-a51b-3dc5723cd210" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_863e9319-1475-4ec3-b5a1-46b1a0cc170e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_863e9319-1475-4ec3-b5a1-46b1a0cc170e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_863e9319-1475-4ec3-b5a1-46b1a0cc170e" xlink:to="loc_us-gaap_SegmentDomain_863e9319-1475-4ec3-b5a1-46b1a0cc170e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_f227f7d9-5d14-45ff-8e09-d63c945f13eb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_863e9319-1475-4ec3-b5a1-46b1a0cc170e" xlink:to="loc_us-gaap_SegmentDomain_f227f7d9-5d14-45ff-8e09-d63c945f13eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_BusinesstoBusinessSegmentMember_2b81677d-58b4-41b7-ab1f-00af90909aa2" xlink:href="odc-20210131.xsd#odc_BusinesstoBusinessSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_f227f7d9-5d14-45ff-8e09-d63c945f13eb" xlink:to="loc_odc_BusinesstoBusinessSegmentMember_2b81677d-58b4-41b7-ab1f-00af90909aa2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_RetailAndWholesaleSegmentMember_5f7ff38b-450b-41e7-97ce-061927c81e5e" xlink:href="odc-20210131.xsd#odc_RetailAndWholesaleSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_f227f7d9-5d14-45ff-8e09-d63c945f13eb" xlink:to="loc_odc_RetailAndWholesaleSegmentMember_5f7ff38b-450b-41e7-97ce-061927c81e5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_fe2bb481-b03d-412a-8787-17f21aa0af81" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_7fdd2d4c-f564-450f-a51b-3dc5723cd210" xlink:to="loc_srt_ProductOrServiceAxis_fe2bb481-b03d-412a-8787-17f21aa0af81" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_fe2bb481-b03d-412a-8787-17f21aa0af81_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_fe2bb481-b03d-412a-8787-17f21aa0af81" xlink:to="loc_srt_ProductsAndServicesDomain_fe2bb481-b03d-412a-8787-17f21aa0af81_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_4ffad526-d60e-4ef4-8936-a349302635aa" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_fe2bb481-b03d-412a-8787-17f21aa0af81" xlink:to="loc_srt_ProductsAndServicesDomain_4ffad526-d60e-4ef4-8936-a349302635aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_CatLitterMember_4e77dbb1-1174-4296-9141-8252c1744779" xlink:href="odc-20210131.xsd#odc_CatLitterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4ffad526-d60e-4ef4-8936-a349302635aa" xlink:to="loc_odc_CatLitterMember_4e77dbb1-1174-4296-9141-8252c1744779" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_IndustrialandSportsMember_02e36ec0-f2c5-440d-ad2f-22692d98141e" xlink:href="odc-20210131.xsd#odc_IndustrialandSportsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4ffad526-d60e-4ef4-8936-a349302635aa" xlink:to="loc_odc_IndustrialandSportsMember_02e36ec0-f2c5-440d-ad2f-22692d98141e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_AgriculturalandHorticulturalMember_55458008-110f-4137-9165-cd29c47578a3" xlink:href="odc-20210131.xsd#odc_AgriculturalandHorticulturalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4ffad526-d60e-4ef4-8936-a349302635aa" xlink:to="loc_odc_AgriculturalandHorticulturalMember_55458008-110f-4137-9165-cd29c47578a3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_BleachingClayandFluidsPurificationMember_706d42e9-2730-419a-88d1-d5c6f668b5a9" xlink:href="odc-20210131.xsd#odc_BleachingClayandFluidsPurificationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4ffad526-d60e-4ef4-8936-a349302635aa" xlink:to="loc_odc_BleachingClayandFluidsPurificationMember_706d42e9-2730-419a-88d1-d5c6f668b5a9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_AnimalHealthandNutritionMember_740d4e7b-bacd-4c94-8339-5863fd04b673" xlink:href="odc-20210131.xsd#odc_AnimalHealthandNutritionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4ffad526-d60e-4ef4-8936-a349302635aa" xlink:to="loc_odc_AnimalHealthandNutritionMember_740d4e7b-bacd-4c94-8339-5863fd04b673" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/OperatingSegmentsDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#OperatingSegmentsDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/OperatingSegmentsDetails" xlink:type="extended" id="ic6b2d0dc6d29485ea1c2c79b6f9c9316_OperatingSegmentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_9276d269-7d48-4943-94fd-240f2ee15b9f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_Assets_9276d269-7d48-4943-94fd-240f2ee15b9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_19fab182-a1bd-4da6-b503-942208bc7b27" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_19fab182-a1bd-4da6-b503-942208bc7b27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_SegmentReportingInformationOperatingIncomeForReportableSegment_3be45385-9112-42e5-a597-405e3cdb558a" xlink:href="odc-20210131.xsd#odc_SegmentReportingInformationOperatingIncomeForReportableSegment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_odc_SegmentReportingInformationOperatingIncomeForReportableSegment_3be45385-9112-42e5-a597-405e3cdb558a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_CorporateExpenses_7e927a05-ec19-4b12-a7cc-318fe3578900" xlink:href="odc-20210131.xsd#odc_CorporateExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_odc_CorporateExpenses_7e927a05-ec19-4b12-a7cc-318fe3578900" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_4c2153ca-5fbe-4475-b785-9efdbb205ab1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_OperatingIncomeLoss_4c2153ca-5fbe-4475-b785-9efdbb205ab1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_f09c66f9-2bf7-4126-bac5-5bc0f8604414" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_f09c66f9-2bf7-4126-bac5-5bc0f8604414" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1756e617-e83a-44d7-9f2b-a726dc9d250d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1756e617-e83a-44d7-9f2b-a726dc9d250d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_4b50ebf6-034f-4d36-96ba-d8a4c9007644" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_4b50ebf6-034f-4d36-96ba-d8a4c9007644" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_3ef85dae-4111-432e-8732-ae24ed1d2dda" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_ProfitLoss_3ef85dae-4111-432e-8732-ae24ed1d2dda" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_be3fd2f0-bd08-42e5-8efd-3cab13218e42" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_be3fd2f0-bd08-42e5-8efd-3cab13218e42" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_f5b83fee-f007-4e8c-bb3a-35dd73c5d360" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_NetIncomeLoss_f5b83fee-f007-4e8c-bb3a-35dd73c5d360" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_38f39110-4558-4f99-bfad-fbade6a8c4c2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fd46a719-d57e-43fc-af5f-dc8d30b4dd6f" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_38f39110-4558-4f99-bfad-fbade6a8c4c2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_a0422d78-b960-4249-84e0-8338222c62a6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_38f39110-4558-4f99-bfad-fbade6a8c4c2" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_a0422d78-b960-4249-84e0-8338222c62a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a0422d78-b960-4249-84e0-8338222c62a6_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_a0422d78-b960-4249-84e0-8338222c62a6" xlink:to="loc_us-gaap_SegmentDomain_a0422d78-b960-4249-84e0-8338222c62a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_9a9d4f81-2325-43f7-a973-2d2c8e2608e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_a0422d78-b960-4249-84e0-8338222c62a6" xlink:to="loc_us-gaap_SegmentDomain_9a9d4f81-2325-43f7-a973-2d2c8e2608e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_BusinesstoBusinessSegmentMember_d2d1f13d-020d-402e-827b-81a10d431f27" xlink:href="odc-20210131.xsd#odc_BusinesstoBusinessSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9a9d4f81-2325-43f7-a973-2d2c8e2608e6" xlink:to="loc_odc_BusinesstoBusinessSegmentMember_d2d1f13d-020d-402e-827b-81a10d431f27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_RetailAndWholesaleSegmentMember_162a8aad-c934-46cd-ad2e-9d5f38dd585e" xlink:href="odc-20210131.xsd#odc_RetailAndWholesaleSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9a9d4f81-2325-43f7-a973-2d2c8e2608e6" xlink:to="loc_odc_RetailAndWholesaleSegmentMember_162a8aad-c934-46cd-ad2e-9d5f38dd585e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_d112cc32-75d4-465f-ba4b-992484a07be2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9a9d4f81-2325-43f7-a973-2d2c8e2608e6" xlink:to="loc_us-gaap_AllOtherSegmentsMember_d112cc32-75d4-465f-ba4b-992484a07be2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/OperatingSegmentsNarrativeDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#OperatingSegmentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/OperatingSegmentsNarrativeDetails" xlink:type="extended" id="i430d06d582d54cb495802c845a6fe3a5_OperatingSegmentsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_720551cf-38e0-4b29-b3d5-05a11fe2d13c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_0216276f-8c9e-4d65-8521-4ef1b72b2d14" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_720551cf-38e0-4b29-b3d5-05a11fe2d13c" xlink:to="loc_us-gaap_NumberOfReportableSegments_0216276f-8c9e-4d65-8521-4ef1b72b2d14" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_49c92f6f-9387-412b-a6e0-c2e9b3fde1eb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_720551cf-38e0-4b29-b3d5-05a11fe2d13c" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_49c92f6f-9387-412b-a6e0-c2e9b3fde1eb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_dfc32f60-4004-424e-952d-c08829350b76" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_49c92f6f-9387-412b-a6e0-c2e9b3fde1eb" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_dfc32f60-4004-424e-952d-c08829350b76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_dfc32f60-4004-424e-952d-c08829350b76_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_dfc32f60-4004-424e-952d-c08829350b76" xlink:to="loc_us-gaap_SegmentDomain_dfc32f60-4004-424e-952d-c08829350b76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_2193d519-1ab7-4e15-9b5e-0a7c1745a141" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_dfc32f60-4004-424e-952d-c08829350b76" xlink:to="loc_us-gaap_SegmentDomain_2193d519-1ab7-4e15-9b5e-0a7c1745a141" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/StockBasedCompensation" xlink:type="simple" xlink:href="odc-20210131.xsd#StockBasedCompensation"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/StockBasedCompensation" xlink:type="extended" id="i1d49b4fd30b34d0c84fd65b66696712a_StockBasedCompensation"/>
  <link:roleRef roleURI="http://www.oildri.com/role/StockBasedCompensationTables" xlink:type="simple" xlink:href="odc-20210131.xsd#StockBasedCompensationTables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/StockBasedCompensationTables" xlink:type="extended" id="id53ca5a1e6334adbac06ba212f4267f9_StockBasedCompensationTables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/StockBasedCompensationSummaryofRestrictedStockTransactionsDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#StockBasedCompensationSummaryofRestrictedStockTransactionsDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/StockBasedCompensationSummaryofRestrictedStockTransactionsDetails" xlink:type="extended" id="iebdfbd7346a84877a9bb340a3465be16_StockBasedCompensationSummaryofRestrictedStockTransactionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_3db99268-1b7f-4d17-8520-64533dfa5e87" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_3db99268-1b7f-4d17-8520-64533dfa5e87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_129e2657-670a-4dac-a6cd-00a8629f5d10" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_129e2657-670a-4dac-a6cd-00a8629f5d10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_9f9bc6d7-7fc2-4e2f-b62f-b559fc38dbcd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_9f9bc6d7-7fc2-4e2f-b62f-b559fc38dbcd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d7cf39c0-df52-4356-a3e5-594f7a6df8ba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d7cf39c0-df52-4356-a3e5-594f7a6df8ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_c5595ce7-23c1-4b97-a180-8bc11907568d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a0fa44aa-1c80-4937-935f-b4e8c6f57c3c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a0fa44aa-1c80-4937-935f-b4e8c6f57c3c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_182c50cf-7142-482d-b903-2a8e0d96bfaf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_182c50cf-7142-482d-b903-2a8e0d96bfaf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_7ca61300-e452-40ff-8d84-60c12baaead3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_7ca61300-e452-40ff-8d84-60c12baaead3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_366fca89-d666-4763-9051-7826fd1962a6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_366fca89-d666-4763-9051-7826fd1962a6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3e79b5b2-96ab-4323-b44a-5f545b135284" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_55935abd-a62a-433b-9feb-efab77508410" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d62a2639-bf6f-4668-8b02-fc20a7698ee5" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_55935abd-a62a-433b-9feb-efab77508410" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_09666d0e-272e-44c8-b54f-33be480984b6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_55935abd-a62a-433b-9feb-efab77508410" xlink:to="loc_us-gaap_AwardTypeAxis_09666d0e-272e-44c8-b54f-33be480984b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_09666d0e-272e-44c8-b54f-33be480984b6_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_09666d0e-272e-44c8-b54f-33be480984b6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_09666d0e-272e-44c8-b54f-33be480984b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_257264c5-330a-4973-adaf-1476c5d36ce7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_09666d0e-272e-44c8-b54f-33be480984b6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_257264c5-330a-4973-adaf-1476c5d36ce7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_e62d154c-450a-4364-8fb5-e9624b2f3e8a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_257264c5-330a-4973-adaf-1476c5d36ce7" xlink:to="loc_us-gaap_RestrictedStockMember_e62d154c-450a-4364-8fb5-e9624b2f3e8a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_9cc28c82-6910-4b59-a477-9c2fd23776f8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_55935abd-a62a-433b-9feb-efab77508410" xlink:to="loc_us-gaap_StatementClassOfStockAxis_9cc28c82-6910-4b59-a477-9c2fd23776f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_9cc28c82-6910-4b59-a477-9c2fd23776f8_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_9cc28c82-6910-4b59-a477-9c2fd23776f8" xlink:to="loc_us-gaap_ClassOfStockDomain_9cc28c82-6910-4b59-a477-9c2fd23776f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_a68a3b65-cc3c-47fe-8c07-89687303b635" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_9cc28c82-6910-4b59-a477-9c2fd23776f8" xlink:to="loc_us-gaap_ClassOfStockDomain_a68a3b65-cc3c-47fe-8c07-89687303b635" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_ecc0cdf6-3ef6-481f-955c-8447c37d6e57" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a68a3b65-cc3c-47fe-8c07-89687303b635" xlink:to="loc_us-gaap_CommonStockMember_ecc0cdf6-3ef6-481f-955c-8447c37d6e57" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/StockBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#StockBasedCompensationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/StockBasedCompensationNarrativeDetails" xlink:type="extended" id="i9f510564e7594dd5a58356e9679db282_StockBasedCompensationNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea8c8649-9aec-4c1d-9865-5722a76021b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_7509b9aa-ed08-4c55-b7be-3895128a2802" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea8c8649-9aec-4c1d-9865-5722a76021b3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_7509b9aa-ed08-4c55-b7be-3895128a2802" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_e3bd8c5e-e826-400d-aaaf-5aec8aa4c111" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea8c8649-9aec-4c1d-9865-5722a76021b3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_e3bd8c5e-e826-400d-aaaf-5aec8aa4c111" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodminimum_ef30c5ff-9bd9-4c92-b69a-e4fbe6d11de2" xlink:href="odc-20210131.xsd#odc_Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodminimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea8c8649-9aec-4c1d-9865-5722a76021b3" xlink:to="loc_odc_Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodminimum_ef30c5ff-9bd9-4c92-b69a-e4fbe6d11de2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodmaximum_fcfcd837-85f5-4942-af57-68534784e526" xlink:href="odc-20210131.xsd#odc_Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodmaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea8c8649-9aec-4c1d-9865-5722a76021b3" xlink:to="loc_odc_Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodmaximum_fcfcd837-85f5-4942-af57-68534784e526" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_865977b4-2a0d-4a6f-b217-52b44d998c18" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea8c8649-9aec-4c1d-9865-5722a76021b3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_865977b4-2a0d-4a6f-b217-52b44d998c18" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_5d63165f-19a2-4b26-8e92-1d20cb3d1b77" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea8c8649-9aec-4c1d-9865-5722a76021b3" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_5d63165f-19a2-4b26-8e92-1d20cb3d1b77" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9592daeb-21ad-438c-8c05-a72b3bbb1add" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ea8c8649-9aec-4c1d-9865-5722a76021b3" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9592daeb-21ad-438c-8c05-a72b3bbb1add" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_0eae3d72-4579-4f9c-a584-0a38aea915f0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9592daeb-21ad-438c-8c05-a72b3bbb1add" xlink:to="loc_us-gaap_PlanNameAxis_0eae3d72-4579-4f9c-a584-0a38aea915f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_0eae3d72-4579-4f9c-a584-0a38aea915f0_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_0eae3d72-4579-4f9c-a584-0a38aea915f0" xlink:to="loc_us-gaap_PlanNameDomain_0eae3d72-4579-4f9c-a584-0a38aea915f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_2f0ae38b-6375-4497-b3ed-29ce2bc92401" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_0eae3d72-4579-4f9c-a584-0a38aea915f0" xlink:to="loc_us-gaap_PlanNameDomain_2f0ae38b-6375-4497-b3ed-29ce2bc92401" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_odc_A2006PlanMember_2419d142-2d01-49c9-b713-994da9cb5ca2" xlink:href="odc-20210131.xsd#odc_A2006PlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_2f0ae38b-6375-4497-b3ed-29ce2bc92401" xlink:to="loc_odc_A2006PlanMember_2419d142-2d01-49c9-b713-994da9cb5ca2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_fe0630e0-8dae-4223-9f8b-ce602a5ead21" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9592daeb-21ad-438c-8c05-a72b3bbb1add" xlink:to="loc_us-gaap_AwardTypeAxis_fe0630e0-8dae-4223-9f8b-ce602a5ead21" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fe0630e0-8dae-4223-9f8b-ce602a5ead21_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_fe0630e0-8dae-4223-9f8b-ce602a5ead21" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fe0630e0-8dae-4223-9f8b-ce602a5ead21_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0d211328-785e-4982-8f50-0151c94cc83d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_fe0630e0-8dae-4223-9f8b-ce602a5ead21" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0d211328-785e-4982-8f50-0151c94cc83d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_b8d8c7f9-4c15-49bb-88ea-8e03cda06214" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0d211328-785e-4982-8f50-0151c94cc83d" xlink:to="loc_us-gaap_RestrictedStockMember_b8d8c7f9-4c15-49bb-88ea-8e03cda06214" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_783deded-54bc-4ce0-af26-27c44b6926c1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9592daeb-21ad-438c-8c05-a72b3bbb1add" xlink:to="loc_us-gaap_StatementClassOfStockAxis_783deded-54bc-4ce0-af26-27c44b6926c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_783deded-54bc-4ce0-af26-27c44b6926c1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_783deded-54bc-4ce0-af26-27c44b6926c1" xlink:to="loc_us-gaap_ClassOfStockDomain_783deded-54bc-4ce0-af26-27c44b6926c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_93e42a35-4846-46c4-b956-13d49c377a7e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_783deded-54bc-4ce0-af26-27c44b6926c1" xlink:to="loc_us-gaap_ClassOfStockDomain_93e42a35-4846-46c4-b956-13d49c377a7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_b8c754ff-b7b9-4fae-a183-ea2db9650fe4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_93e42a35-4846-46c4-b956-13d49c377a7e" xlink:to="loc_us-gaap_CommonStockMember_b8c754ff-b7b9-4fae-a183-ea2db9650fe4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_38a66658-1a85-4bf4-a356-e355ca3677f2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_93e42a35-4846-46c4-b956-13d49c377a7e" xlink:to="loc_us-gaap_CommonClassBMember_38a66658-1a85-4bf4-a356-e355ca3677f2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/AccumulatedOtherComprehensiveLossIncomeNotes" xlink:type="simple" xlink:href="odc-20210131.xsd#AccumulatedOtherComprehensiveLossIncomeNotes"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/AccumulatedOtherComprehensiveLossIncomeNotes" xlink:type="extended" id="ie5d68551d7ef4a36af20649d08d18656_AccumulatedOtherComprehensiveLossIncomeNotes"/>
  <link:roleRef roleURI="http://www.oildri.com/role/AccumulatedOtherComprehensiveLossIncomeTables" xlink:type="simple" xlink:href="odc-20210131.xsd#AccumulatedOtherComprehensiveLossIncomeTables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/AccumulatedOtherComprehensiveLossIncomeTables" xlink:type="extended" id="i1d10b1901af9424da1ba505578400199_AccumulatedOtherComprehensiveLossIncomeTables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/AccumulatedOtherComprehensiveLossIncomeDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#AccumulatedOtherComprehensiveLossIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/AccumulatedOtherComprehensiveLossIncomeDetails" xlink:type="extended" id="id30407cf4620476db8cbd62ebdfc9bd6_AccumulatedOtherComprehensiveLossIncomeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_9c74db26-78a8-4dd3-aa2f-fb800de89c81" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1981ce57-75fb-4443-b940-4b1fa152f0e4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_9c74db26-78a8-4dd3-aa2f-fb800de89c81" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1981ce57-75fb-4443-b940-4b1fa152f0e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_5c7b2cb3-a57a-4104-94dd-244687bbc181" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_9c74db26-78a8-4dd3-aa2f-fb800de89c81" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_5c7b2cb3-a57a-4104-94dd-244687bbc181" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_387ef894-d460-4573-bcb1-a643f597c5c0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_9c74db26-78a8-4dd3-aa2f-fb800de89c81" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_387ef894-d460-4573-bcb1-a643f597c5c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax_ac557483-2f36-4ffc-84dc-e3535c370a67" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_9c74db26-78a8-4dd3-aa2f-fb800de89c81" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax_ac557483-2f36-4ffc-84dc-e3535c370a67" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_a631b9dc-664d-432d-b316-390e41333ec1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_9c74db26-78a8-4dd3-aa2f-fb800de89c81" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_a631b9dc-664d-432d-b316-390e41333ec1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_63fe632e-af86-4280-b709-620f7a63445d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_352f025a-6208-4f5f-9533-45b1c9c17934" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_9c74db26-78a8-4dd3-aa2f-fb800de89c81" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_352f025a-6208-4f5f-9533-45b1c9c17934" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_9d3d5af9-6a85-4d47-91a5-74e005ab96bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_352f025a-6208-4f5f-9533-45b1c9c17934" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_9d3d5af9-6a85-4d47-91a5-74e005ab96bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_9d3d5af9-6a85-4d47-91a5-74e005ab96bd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_9d3d5af9-6a85-4d47-91a5-74e005ab96bd" xlink:to="loc_us-gaap_EquityComponentDomain_9d3d5af9-6a85-4d47-91a5-74e005ab96bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_3be46c93-6667-4933-8fa8-08e7885d499b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_9d3d5af9-6a85-4d47-91a5-74e005ab96bd" xlink:to="loc_us-gaap_EquityComponentDomain_3be46c93-6667-4933-8fa8-08e7885d499b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_30d3be81-b899-4c86-9cf3-8e5437d2127c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3be46c93-6667-4933-8fa8-08e7885d499b" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_30d3be81-b899-4c86-9cf3-8e5437d2127c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_baf245de-31b4-485e-bd95-954407f5e144" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3be46c93-6667-4933-8fa8-08e7885d499b" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_baf245de-31b4-485e-bd95-954407f5e144" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/AccumulatedOtherComprehensiveLossIncomeNarrativeDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#AccumulatedOtherComprehensiveLossIncomeNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/AccumulatedOtherComprehensiveLossIncomeNarrativeDetails" xlink:type="extended" id="i968b79d7b5f640799139c8a4bd13c00c_AccumulatedOtherComprehensiveLossIncomeNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_bae5763f-2ef9-4cdb-9614-11f2f4004c2b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax_ad2e72a6-55fe-401c-81bc-38a633651ff2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_bae5763f-2ef9-4cdb-9614-11f2f4004c2b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax_ad2e72a6-55fe-401c-81bc-38a633651ff2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax_e4dd0f25-370a-4ebe-8f54-5a8ee5c4aa15" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_bae5763f-2ef9-4cdb-9614-11f2f4004c2b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax_e4dd0f25-370a-4ebe-8f54-5a8ee5c4aa15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8a7810e1-e84b-4e0f-9e35-5becab505080" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_bae5763f-2ef9-4cdb-9614-11f2f4004c2b" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8a7810e1-e84b-4e0f-9e35-5becab505080" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_3c232b3b-a804-47e1-8046-0b485baada76" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8a7810e1-e84b-4e0f-9e35-5becab505080" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_3c232b3b-a804-47e1-8046-0b485baada76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_3c232b3b-a804-47e1-8046-0b485baada76_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3c232b3b-a804-47e1-8046-0b485baada76" xlink:to="loc_us-gaap_EquityComponentDomain_3c232b3b-a804-47e1-8046-0b485baada76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_a2973d8e-8240-4201-b536-d78a46cf3a50" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3c232b3b-a804-47e1-8046-0b485baada76" xlink:to="loc_us-gaap_EquityComponentDomain_a2973d8e-8240-4201-b536-d78a46cf3a50" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/RelatedPartyTransactionsNotes" xlink:type="simple" xlink:href="odc-20210131.xsd#RelatedPartyTransactionsNotes"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/RelatedPartyTransactionsNotes" xlink:type="extended" id="i3b87012d4f194787b7b55e7887c9f0ec_RelatedPartyTransactionsNotes"/>
  <link:roleRef roleURI="http://www.oildri.com/role/RelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#RelatedPartyTransactionsDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/RelatedPartyTransactionsDetails" xlink:type="extended" id="i32f93eb7031748c5a6d8cc81a61d3be5_RelatedPartyTransactionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_afaa7df0-2bfe-4911-a6c5-3215029fa785" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromRelatedParties_3d951d46-cbb4-4cae-94a1-44f014e58964" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_afaa7df0-2bfe-4911-a6c5-3215029fa785" xlink:to="loc_us-gaap_RevenueFromRelatedParties_3d951d46-cbb4-4cae-94a1-44f014e58964" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableRelatedPartiesCurrent_41ddaa0d-99d3-4d70-a2d4-5a4a1f5b4c9a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableRelatedPartiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_afaa7df0-2bfe-4911-a6c5-3215029fa785" xlink:to="loc_us-gaap_AccountsReceivableRelatedPartiesCurrent_41ddaa0d-99d3-4d70-a2d4-5a4a1f5b4c9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_d44debb5-1dde-44f1-8238-469719938a34" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_afaa7df0-2bfe-4911-a6c5-3215029fa785" xlink:to="loc_us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_d44debb5-1dde-44f1-8238-469719938a34" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableRelatedPartiesCurrent_eb163048-7d61-4517-a340-0617708d5572" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableRelatedPartiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_afaa7df0-2bfe-4911-a6c5-3215029fa785" xlink:to="loc_us-gaap_AccountsPayableRelatedPartiesCurrent_eb163048-7d61-4517-a340-0617708d5572" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_c081f350-8a8e-407e-8ddb-f6793dbdcbc2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_afaa7df0-2bfe-4911-a6c5-3215029fa785" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_c081f350-8a8e-407e-8ddb-f6793dbdcbc2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f11b7582-4d7d-49ab-b251-146e8996a6ef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_c081f350-8a8e-407e-8ddb-f6793dbdcbc2" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f11b7582-4d7d-49ab-b251-146e8996a6ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_f11b7582-4d7d-49ab-b251-146e8996a6ef_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f11b7582-4d7d-49ab-b251-146e8996a6ef" xlink:to="loc_us-gaap_RelatedPartyDomain_f11b7582-4d7d-49ab-b251-146e8996a6ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_0236e929-c91e-4093-9e0c-8b51cf36c3fd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f11b7582-4d7d-49ab-b251-146e8996a6ef" xlink:to="loc_us-gaap_RelatedPartyDomain_0236e929-c91e-4093-9e0c-8b51cf36c3fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_DirectorMember_c1a84e4b-157c-42b7-9b5c-571dbf86c0c3" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_DirectorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_0236e929-c91e-4093-9e0c-8b51cf36c3fd" xlink:to="loc_srt_DirectorMember_c1a84e4b-157c-42b7-9b5c-571dbf86c0c3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.oildri.com/role/SubsequentEventsNotes" xlink:type="simple" xlink:href="odc-20210131.xsd#SubsequentEventsNotes"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/SubsequentEventsNotes" xlink:type="extended" id="i975998b2340143f0916d1781c1ce756d_SubsequentEventsNotes"/>
  <link:roleRef roleURI="http://www.oildri.com/role/SubsequentEventsTables" xlink:type="simple" xlink:href="odc-20210131.xsd#SubsequentEventsTables"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/SubsequentEventsTables" xlink:type="extended" id="i6ae8c499ab4e4b458873188e90dc3e9f_SubsequentEventsTables"/>
  <link:roleRef roleURI="http://www.oildri.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="odc-20210131.xsd#SubsequentEventsDetails"/>
  <link:definitionLink xlink:role="http://www.oildri.com/role/SubsequentEventsDetails" xlink:type="extended" id="i57d893e6e308477a92ae07767110178d_SubsequentEventsDetails"/>
</link:linkbase>
