<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:5e7f8b86-c03b-4268-8b1d-9255c6e6e2fa,g:4d34f10b-0046-4aaa-a4f7-529d6f5eef9e-->
<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.publix.com/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="ck0000081061-20250628.xsd#DocumentandEntityInformation"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/DocumentandEntityInformation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_1b30115e-2a9b-4ba0-bef2-fc95b5d5944d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntitiesTable_1b30115e-2a9b-4ba0-bef2-fc95b5d5944d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_f5b26377-4520-4a09-a424-847d7ed29acb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_1b30115e-2a9b-4ba0-bef2-fc95b5d5944d" xlink:to="loc_dei_LegalEntityAxis_f5b26377-4520-4a09-a424-847d7ed29acb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_f5b26377-4520-4a09-a424-847d7ed29acb_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_f5b26377-4520-4a09-a424-847d7ed29acb" xlink:to="loc_dei_EntityDomain_f5b26377-4520-4a09-a424-847d7ed29acb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b87edf98-7716-427a-b143-18d061dde0a5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_f5b26377-4520-4a09-a424-847d7ed29acb" xlink:to="loc_dei_EntityDomain_b87edf98-7716-427a-b143-18d061dde0a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_b67548be-7ae3-4b9e-b7c4-5c945d7688d9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_DocumentType_b67548be-7ae3-4b9e-b7c4-5c945d7688d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_43e935cd-7978-4edc-a5b2-197006e14016" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_DocumentQuarterlyReport_43e935cd-7978-4edc-a5b2-197006e14016" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_ddaaeb4b-1a0f-4e3f-a596-172724ea5663" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_AmendmentFlag_ddaaeb4b-1a0f-4e3f-a596-172724ea5663" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_603d1424-e154-4093-a8cc-02db4c2c31d6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_DocumentPeriodEndDate_603d1424-e154-4093-a8cc-02db4c2c31d6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_0c7c1690-a4d4-4b0b-b4d3-afbcc8a29358" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_DocumentTransitionReport_0c7c1690-a4d4-4b0b-b4d3-afbcc8a29358" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_3595cee2-b286-4863-86bd-c5e76b66dab9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_DocumentFiscalYearFocus_3595cee2-b286-4863-86bd-c5e76b66dab9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_a587f940-6a23-44ef-9a76-3df5463946d0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_DocumentFiscalPeriodFocus_a587f940-6a23-44ef-9a76-3df5463946d0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_f44add2f-e950-4af0-850a-8297417e83dd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityFileNumber_f44add2f-e950-4af0-850a-8297417e83dd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_e1621896-fc11-410a-b852-0c7b7f6759b2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityRegistrantName_e1621896-fc11-410a-b852-0c7b7f6759b2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_658158d2-9473-41bd-a2e5-e7eae3e441f5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityCentralIndexKey_658158d2-9473-41bd-a2e5-e7eae3e441f5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_031ef854-bd7f-494a-be6e-8a33551a2eea" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityIncorporationStateCountryCode_031ef854-bd7f-494a-be6e-8a33551a2eea" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_61f3486e-bf45-4603-bd0f-c3eca3893939" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityTaxIdentificationNumber_61f3486e-bf45-4603-bd0f-c3eca3893939" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_bb3cac0f-c9bf-415b-bde2-00a9f8d8c596" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityAddressAddressLine1_bb3cac0f-c9bf-415b-bde2-00a9f8d8c596" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_9f25e035-700a-4c3a-a9f5-021365ac077b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityAddressCityOrTown_9f25e035-700a-4c3a-a9f5-021365ac077b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_7af5b7dc-7b3f-4a62-9d4f-2760f9e9dd73" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityAddressStateOrProvince_7af5b7dc-7b3f-4a62-9d4f-2760f9e9dd73" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_b8fe9645-ed9c-4de6-a910-30aa0a1cdea3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityAddressPostalZipCode_b8fe9645-ed9c-4de6-a910-30aa0a1cdea3" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_c6d9b890-be4d-4bc5-bc5a-a4d63427f7d3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_CityAreaCode_c6d9b890-be4d-4bc5-bc5a-a4d63427f7d3" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_2e10c097-2581-4778-aaff-70d247a625f7" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_LocalPhoneNumber_2e10c097-2581-4778-aaff-70d247a625f7" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_2cabfcb7-7ad5-47be-85e2-6657735dc287" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_CurrentFiscalYearEndDate_2cabfcb7-7ad5-47be-85e2-6657735dc287" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_adb34c00-bfd7-4543-8272-41088f66db1b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityCurrentReportingStatus_adb34c00-bfd7-4543-8272-41088f66db1b" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_e57067c6-c896-4043-8368-533291d50c3b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityInteractiveDataCurrent_e57067c6-c896-4043-8368-533291d50c3b" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_bfcf6c70-1509-4a83-a7ce-5aaaa32d72f0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityFilerCategory_bfcf6c70-1509-4a83-a7ce-5aaaa32d72f0" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_9783ef4c-60bf-4bd3-becd-2d8d7876f98b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntitySmallBusiness_9783ef4c-60bf-4bd3-becd-2d8d7876f98b" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_57540540-f6b3-4f15-b034-55df4046a0ff" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityEmergingGrowthCompany_57540540-f6b3-4f15-b034-55df4046a0ff" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_470c3dcb-0f7a-44da-b1d7-ecfb93199a1b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityShellCompany_470c3dcb-0f7a-44da-b1d7-ecfb93199a1b" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_fea890ad-a403-4bc8-823c-9b715ed08490" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_580c358b-ec5e-44c3-813c-591d95419b1b" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_fea890ad-a403-4bc8-823c-9b715ed08490" xlink:type="arc" order="25"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITYCONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="ck0000081061-20250628.xsd#CONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITYCONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITYCONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_a9de3363-d02c-458d-9ff4-d20bfafe2b63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_5400d8b9-a732-4456-a46e-fdd812114352" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_a9de3363-d02c-458d-9ff4-d20bfafe2b63" xlink:to="loc_us-gaap_StatementTable_5400d8b9-a732-4456-a46e-fdd812114352" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_6cb1432a-3550-43fd-8de5-9e0e96569c27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5400d8b9-a732-4456-a46e-fdd812114352" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_6cb1432a-3550-43fd-8de5-9e0e96569c27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_6cb1432a-3550-43fd-8de5-9e0e96569c27_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_6cb1432a-3550-43fd-8de5-9e0e96569c27" xlink:to="loc_us-gaap_EquityComponentDomain_6cb1432a-3550-43fd-8de5-9e0e96569c27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_34663180-44d8-46a8-bdde-4fe2bb889eb7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_6cb1432a-3550-43fd-8de5-9e0e96569c27" xlink:to="loc_us-gaap_EquityComponentDomain_34663180-44d8-46a8-bdde-4fe2bb889eb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_9994670f-32f9-4d0a-afb8-a57c594db25f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_34663180-44d8-46a8-bdde-4fe2bb889eb7" xlink:to="loc_us-gaap_CommonStockMember_9994670f-32f9-4d0a-afb8-a57c594db25f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_4d1b82da-9eab-4a37-9af9-440d951a7db8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_34663180-44d8-46a8-bdde-4fe2bb889eb7" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_4d1b82da-9eab-4a37-9af9-440d951a7db8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_1a6b9f29-9209-44a2-99ab-b5428bb8001f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_34663180-44d8-46a8-bdde-4fe2bb889eb7" xlink:to="loc_us-gaap_RetainedEarningsMember_1a6b9f29-9209-44a2-99ab-b5428bb8001f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_6641fcfa-5e93-4a7e-aae4-dd60a0572ebc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_34663180-44d8-46a8-bdde-4fe2bb889eb7" xlink:to="loc_us-gaap_TreasuryStockCommonMember_6641fcfa-5e93-4a7e-aae4-dd60a0572ebc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_df1ab802-0d31-47b0-8c1d-9c44d14d2e74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_34663180-44d8-46a8-bdde-4fe2bb889eb7" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_df1ab802-0d31-47b0-8c1d-9c44d14d2e74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_CommonStockRelatedToEsopMember_a03f231e-04b9-4120-b4d9-b3ecf7f8988f" xlink:href="ck0000081061-20250628.xsd#ck0000081061_CommonStockRelatedToEsopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_34663180-44d8-46a8-bdde-4fe2bb889eb7" xlink:to="loc_ck0000081061_CommonStockRelatedToEsopMember_a03f231e-04b9-4120-b4d9-b3ecf7f8988f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cc3449c4-de11-40eb-97ee-23e9be4a6da6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a9de3363-d02c-458d-9ff4-d20bfafe2b63" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cc3449c4-de11-40eb-97ee-23e9be4a6da6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_86c896a2-5073-436f-a307-3f2913145828" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cc3449c4-de11-40eb-97ee-23e9be4a6da6" xlink:to="loc_us-gaap_StockholdersEquity_86c896a2-5073-436f-a307-3f2913145828" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_ab70524b-f391-4bcd-838b-3fedd6cce45a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cc3449c4-de11-40eb-97ee-23e9be4a6da6" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_ab70524b-f391-4bcd-838b-3fedd6cce45a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_2c5df994-e256-4bbb-95e5-806591935283" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cc3449c4-de11-40eb-97ee-23e9be4a6da6" xlink:to="loc_us-gaap_DividendsCommonStock_2c5df994-e256-4bbb-95e5-806591935283" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_908be49f-b318-4544-866b-749f0b61f22e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cc3449c4-de11-40eb-97ee-23e9be4a6da6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_908be49f-b318-4544-866b-749f0b61f22e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_c3964e8c-50d1-4983-b524-c89a5113b88d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cc3449c4-de11-40eb-97ee-23e9be4a6da6" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_c3964e8c-50d1-4983-b524-c89a5113b88d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_49019f81-392f-455a-bdfd-449be7f128f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cc3449c4-de11-40eb-97ee-23e9be4a6da6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_49019f81-392f-455a-bdfd-449be7f128f0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease_35d165b9-3920-4d7f-957d-6ba0505db298" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cc3449c4-de11-40eb-97ee-23e9be4a6da6" xlink:to="loc_us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease_35d165b9-3920-4d7f-957d-6ba0505db298" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_9f5674cb-c0f5-446f-bbe8-5f9651608553" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/FairValueMeasurementsforInvestmentsDetails" xlink:type="simple" xlink:href="ck0000081061-20250628.xsd#FairValueMeasurementsforInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/FairValueMeasurementsforInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4c378dba-b1ed-4bc6-ac82-cceca644d904" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_adb256c5-c4ef-483c-bff9-9f44c8a46828" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4c378dba-b1ed-4bc6-ac82-cceca644d904" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_adb256c5-c4ef-483c-bff9-9f44c8a46828" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b57cf6e7-e5f0-48cc-b853-e32d280b145a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_adb256c5-c4ef-483c-bff9-9f44c8a46828" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b57cf6e7-e5f0-48cc-b853-e32d280b145a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b57cf6e7-e5f0-48cc-b853-e32d280b145a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b57cf6e7-e5f0-48cc-b853-e32d280b145a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b57cf6e7-e5f0-48cc-b853-e32d280b145a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_19556b4f-a06f-4bbd-a3f8-4a9bf4f17633" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b57cf6e7-e5f0-48cc-b853-e32d280b145a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_19556b4f-a06f-4bbd-a3f8-4a9bf4f17633" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_1553f8ce-c547-4246-a900-059354033a16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_19556b4f-a06f-4bbd-a3f8-4a9bf4f17633" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_1553f8ce-c547-4246-a900-059354033a16" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_684c964d-f287-4bcc-bb4c-2a1d912a1f5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_19556b4f-a06f-4bbd-a3f8-4a9bf4f17633" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_684c964d-f287-4bcc-bb4c-2a1d912a1f5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_7b2957bb-53a6-43f2-91f8-3f5b643d5f41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_19556b4f-a06f-4bbd-a3f8-4a9bf4f17633" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_7b2957bb-53a6-43f2-91f8-3f5b643d5f41" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecurities_b3fe7a68-b2f9-43f7-9894-3f92abac7ce8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketableSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_4c378dba-b1ed-4bc6-ac82-cceca644d904" xlink:to="loc_us-gaap_MarketableSecurities_b3fe7a68-b2f9-43f7-9894-3f92abac7ce8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/AvailableforSaleDebtSecuritiesReconciliationDetails" xlink:type="simple" xlink:href="ck0000081061-20250628.xsd#AvailableforSaleDebtSecuritiesReconciliationDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/AvailableforSaleDebtSecuritiesReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0b6791cd-26e2-4d3b-a125-a403dd812c07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_fa380943-737d-47e2-986f-13b037351249" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0b6791cd-26e2-4d3b-a125-a403dd812c07" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_fa380943-737d-47e2-986f-13b037351249" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_009e1edc-51b7-42d5-9eb8-601c6d5f2205" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_fa380943-737d-47e2-986f-13b037351249" xlink:to="loc_us-gaap_FinancialInstrumentAxis_009e1edc-51b7-42d5-9eb8-601c6d5f2205" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_009e1edc-51b7-42d5-9eb8-601c6d5f2205_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_009e1edc-51b7-42d5-9eb8-601c6d5f2205" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_009e1edc-51b7-42d5-9eb8-601c6d5f2205_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_c88075c1-7500-45e6-9c0f-df0c8b6143d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_009e1edc-51b7-42d5-9eb8-601c6d5f2205" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_c88075c1-7500-45e6-9c0f-df0c8b6143d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_cf8057cc-c179-4b9c-98ba-4bba637e40d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_c88075c1-7500-45e6-9c0f-df0c8b6143d2" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_cf8057cc-c179-4b9c-98ba-4bba637e40d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_DebtSecuritiesRestrictedMember_bf11242a-b48e-4ec6-867a-513a2d2693cb" xlink:href="ck0000081061-20250628.xsd#ck0000081061_DebtSecuritiesRestrictedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_c88075c1-7500-45e6-9c0f-df0c8b6143d2" xlink:to="loc_ck0000081061_DebtSecuritiesRestrictedMember_bf11242a-b48e-4ec6-867a-513a2d2693cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_2eba0f1d-a0eb-4a08-91ec-f573eaf996fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0b6791cd-26e2-4d3b-a125-a403dd812c07" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_2eba0f1d-a0eb-4a08-91ec-f573eaf996fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_6e8ecbc1-90f2-46c5-874d-747c95609252" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0b6791cd-26e2-4d3b-a125-a403dd812c07" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_6e8ecbc1-90f2-46c5-874d-747c95609252" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_89a459f8-7cfb-402d-94f2-04ea647258aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0b6791cd-26e2-4d3b-a125-a403dd812c07" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_89a459f8-7cfb-402d-94f2-04ea647258aa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_b065a45d-e01a-45e6-9e18-5a8574f209b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_0b6791cd-26e2-4d3b-a125-a403dd812c07" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_b065a45d-e01a-45e6-9e18-5a8574f209b1" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/TemporarilyImpairedAvailableforSaleDebtSecuritiesbyTimePeriodImpairedDetails" xlink:type="simple" xlink:href="ck0000081061-20250628.xsd#TemporarilyImpairedAvailableforSaleDebtSecuritiesbyTimePeriodImpairedDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/TemporarilyImpairedAvailableforSaleDebtSecuritiesbyTimePeriodImpairedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6356e2e6-0a6f-4e2b-b7b5-582a0d7ad5f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_0c7da86e-ed92-4773-8ec4-43cf3c585b9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6356e2e6-0a6f-4e2b-b7b5-582a0d7ad5f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_0c7da86e-ed92-4773-8ec4-43cf3c585b9a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_74fe812f-619e-416c-a375-74739c9f0a20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_0c7da86e-ed92-4773-8ec4-43cf3c585b9a" xlink:to="loc_us-gaap_FinancialInstrumentAxis_74fe812f-619e-416c-a375-74739c9f0a20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_74fe812f-619e-416c-a375-74739c9f0a20_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_74fe812f-619e-416c-a375-74739c9f0a20" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_74fe812f-619e-416c-a375-74739c9f0a20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_31e92ba2-d018-46d0-976e-bd8366884426" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_74fe812f-619e-416c-a375-74739c9f0a20" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_31e92ba2-d018-46d0-976e-bd8366884426" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_2a35b5cc-7682-4171-b1c8-3646e5770f65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_31e92ba2-d018-46d0-976e-bd8366884426" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_2a35b5cc-7682-4171-b1c8-3646e5770f65" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_DebtSecuritiesRestrictedMember_e2cae387-5db3-4d58-a00f-f544c0073d9b" xlink:href="ck0000081061-20250628.xsd#ck0000081061_DebtSecuritiesRestrictedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_31e92ba2-d018-46d0-976e-bd8366884426" xlink:to="loc_ck0000081061_DebtSecuritiesRestrictedMember_e2cae387-5db3-4d58-a00f-f544c0073d9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_257ffb0c-af22-4455-9612-b9b7d46dbc29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6356e2e6-0a6f-4e2b-b7b5-582a0d7ad5f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_257ffb0c-af22-4455-9612-b9b7d46dbc29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_2499b120-ac14-400c-ab4d-4fe3ded57cba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6356e2e6-0a6f-4e2b-b7b5-582a0d7ad5f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_2499b120-ac14-400c-ab4d-4fe3ded57cba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_3734c780-8d34-4ab3-b4cd-6b93b53df438" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6356e2e6-0a6f-4e2b-b7b5-582a0d7ad5f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_3734c780-8d34-4ab3-b4cd-6b93b53df438" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_afaebf7b-6f9d-472a-8130-1052540d168c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6356e2e6-0a6f-4e2b-b7b5-582a0d7ad5f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_afaebf7b-6f9d-472a-8130-1052540d168c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_f5044e20-8a2e-417c-9970-396b5aecf559" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6356e2e6-0a6f-4e2b-b7b5-582a0d7ad5f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_f5044e20-8a2e-417c-9970-396b5aecf559" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_110a086e-2682-4c46-9b52-c6ba47b440c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6356e2e6-0a6f-4e2b-b7b5-582a0d7ad5f9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_110a086e-2682-4c46-9b52-c6ba47b440c4" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/InvestmentsEquitySecuritiesDetails" xlink:type="simple" xlink:href="ck0000081061-20250628.xsd#InvestmentsEquitySecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/InvestmentsEquitySecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_8c600744-9084-4d37-93d6-be4b0205177a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesTable_1950a8c5-3794-4fd6-bf84-71150c12d2d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketableSecuritiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_8c600744-9084-4d37-93d6-be4b0205177a" xlink:to="loc_us-gaap_MarketableSecuritiesTable_1950a8c5-3794-4fd6-bf84-71150c12d2d5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_15a680ce-fc19-4ce6-9fba-119205aade26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketableSecuritiesTable_1950a8c5-3794-4fd6-bf84-71150c12d2d5" xlink:to="loc_us-gaap_FinancialInstrumentAxis_15a680ce-fc19-4ce6-9fba-119205aade26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_15a680ce-fc19-4ce6-9fba-119205aade26_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_15a680ce-fc19-4ce6-9fba-119205aade26" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_15a680ce-fc19-4ce6-9fba-119205aade26_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_9de3b4a0-5683-46c2-af85-5cc517df5699" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_15a680ce-fc19-4ce6-9fba-119205aade26" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_9de3b4a0-5683-46c2-af85-5cc517df5699" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_626a7445-3c10-4e60-983d-2467f05bdaf9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_8c600744-9084-4d37-93d6-be4b0205177a" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_626a7445-3c10-4e60-983d-2467f05bdaf9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/AccumulatedOtherComprehensiveEarningsLossesDetails" xlink:type="simple" xlink:href="ck0000081061-20250628.xsd#AccumulatedOtherComprehensiveEarningsLossesDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/AccumulatedOtherComprehensiveEarningsLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_92ba108d-d801-403a-b34f-a21fe33bc7b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_d869d563-ad41-4b9b-b504-c08cb133ffaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_92ba108d-d801-403a-b34f-a21fe33bc7b7" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_d869d563-ad41-4b9b-b504-c08cb133ffaa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_2ec716cd-f1e8-4852-946e-710de979ce6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_d869d563-ad41-4b9b-b504-c08cb133ffaa" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_2ec716cd-f1e8-4852-946e-710de979ce6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_2ec716cd-f1e8-4852-946e-710de979ce6d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2ec716cd-f1e8-4852-946e-710de979ce6d" xlink:to="loc_us-gaap_EquityComponentDomain_2ec716cd-f1e8-4852-946e-710de979ce6d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_082b0f43-b3a8-4af4-b569-f74467460bb7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2ec716cd-f1e8-4852-946e-710de979ce6d" xlink:to="loc_us-gaap_EquityComponentDomain_082b0f43-b3a8-4af4-b569-f74467460bb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_e1e0e31b-3dd2-433a-bc13-83f389fbf4b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_082b0f43-b3a8-4af4-b569-f74467460bb7" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_e1e0e31b-3dd2-433a-bc13-83f389fbf4b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_2a2114c5-b247-44e3-b669-fca266e0b1da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_082b0f43-b3a8-4af4-b569-f74467460bb7" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_2a2114c5-b247-44e3-b669-fca266e0b1da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_cd175cd5-59c4-4b74-8ba8-e8e533405901" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_082b0f43-b3a8-4af4-b569-f74467460bb7" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_cd175cd5-59c4-4b74-8ba8-e8e533405901" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a63e9666-c236-41d7-a8eb-4b7ea31d3eeb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_92ba108d-d801-403a-b34f-a21fe33bc7b7" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a63e9666-c236-41d7-a8eb-4b7ea31d3eeb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_49cb1f57-40d7-4bd6-9333-5233658a381d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a63e9666-c236-41d7-a8eb-4b7ea31d3eeb" xlink:to="loc_us-gaap_StockholdersEquity_49cb1f57-40d7-4bd6-9333-5233658a381d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_c8ea4ae7-d1d8-4b30-9568-9de4fe1489e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a63e9666-c236-41d7-a8eb-4b7ea31d3eeb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_c8ea4ae7-d1d8-4b30-9568-9de4fe1489e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_333bde8c-44a3-40be-95f8-2dd3e9ff29dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a63e9666-c236-41d7-a8eb-4b7ea31d3eeb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_333bde8c-44a3-40be-95f8-2dd3e9ff29dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_e2c3e110-cbe1-420f-849f-ca9c733407b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a63e9666-c236-41d7-a8eb-4b7ea31d3eeb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_e2c3e110-cbe1-420f-849f-ca9c733407b0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_c479ee6a-60cb-445b-8e0e-394e803b7ca2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_a63e9666-c236-41d7-a8eb-4b7ea31d3eeb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_c479ee6a-60cb-445b-8e0e-394e803b7ca2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_c0316a97-cdda-4630-87f7-164433e08721" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/SubsequentEventDetails" xlink:type="simple" xlink:href="ck0000081061-20250628.xsd#SubsequentEventDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/SubsequentEventDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_867c881b-7d3a-4bb2-ae9c-de1ea8b600a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_073ac80c-5543-4418-b655-f156933960c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_867c881b-7d3a-4bb2-ae9c-de1ea8b600a8" xlink:to="loc_us-gaap_SubsequentEventTable_073ac80c-5543-4418-b655-f156933960c1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_8b984c7c-bef7-4bef-bd9e-76b7697a1c76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_073ac80c-5543-4418-b655-f156933960c1" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_8b984c7c-bef7-4bef-bd9e-76b7697a1c76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_8b984c7c-bef7-4bef-bd9e-76b7697a1c76_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_8b984c7c-bef7-4bef-bd9e-76b7697a1c76" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_8b984c7c-bef7-4bef-bd9e-76b7697a1c76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_2a60ab38-43c4-452f-8e4f-74a0f90e227e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_8b984c7c-bef7-4bef-bd9e-76b7697a1c76" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_2a60ab38-43c4-452f-8e4f-74a0f90e227e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_5813da02-6f17-4519-bb47-25b0559471ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_2a60ab38-43c4-452f-8e4f-74a0f90e227e" xlink:to="loc_us-gaap_SubsequentEventMember_5813da02-6f17-4519-bb47-25b0559471ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsAxis_60e70af0-f1a7-43ad-9711-62d4deebb4b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_073ac80c-5543-4418-b655-f156933960c1" xlink:to="loc_us-gaap_DividendsAxis_60e70af0-f1a7-43ad-9711-62d4deebb4b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_60e70af0-f1a7-43ad-9711-62d4deebb4b5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DividendsAxis_60e70af0-f1a7-43ad-9711-62d4deebb4b5" xlink:to="loc_us-gaap_DividendsDomain_60e70af0-f1a7-43ad-9711-62d4deebb4b5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_6cbe680a-e1b5-41b4-a2bf-b5e07ae17fb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DividendsAxis_60e70af0-f1a7-43ad-9711-62d4deebb4b5" xlink:to="loc_us-gaap_DividendsDomain_6cbe680a-e1b5-41b4-a2bf-b5e07ae17fb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_O2025Q3DividendsMember_39112f37-1cff-480b-b8cd-8e2fbad3a37a" xlink:href="ck0000081061-20250628.xsd#ck0000081061_O2025Q3DividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_6cbe680a-e1b5-41b4-a2bf-b5e07ae17fb9" xlink:to="loc_ck0000081061_O2025Q3DividendsMember_39112f37-1cff-480b-b8cd-8e2fbad3a37a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_b29f8a60-84bc-4ef0-9013-f7293233f09a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableDateDeclaredDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_867c881b-7d3a-4bb2-ae9c-de1ea8b600a8" xlink:to="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_b29f8a60-84bc-4ef0-9013-f7293233f09a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_8ea93404-2fb3-40f5-80c9-a73d5a72a659" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_867c881b-7d3a-4bb2-ae9c-de1ea8b600a8" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_8ea93404-2fb3-40f5-80c9-a73d5a72a659" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_01c4bcae-aad9-4f5c-8630-1204da44e454" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_867c881b-7d3a-4bb2-ae9c-de1ea8b600a8" xlink:to="loc_us-gaap_DividendsCommonStockCash_01c4bcae-aad9-4f5c-8630-1204da44e454" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_d157ff8d-4081-45ae-af54-fb120dd4ba99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendPayableDateToBePaidDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_867c881b-7d3a-4bb2-ae9c-de1ea8b600a8" xlink:to="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_d157ff8d-4081-45ae-af54-fb120dd4ba99" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_86af2bd1-4c0f-449a-8c8e-427ac7c69e23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_867c881b-7d3a-4bb2-ae9c-de1ea8b600a8" xlink:to="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_86af2bd1-4c0f-449a-8c8e-427ac7c69e23" xlink:type="arc" order="4"/>
  </link:definitionLink>
</link:linkbase>
