<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019dfe5a-ceff-7b11-8e7b-8da7bf09b4cd,g:d564058a-6371-4b07-96d1-0f6ab99152c7-->
<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="ck0000081061-20260627.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_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019dfe5a-cf00-76d7-9209-996217c48df5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntitiesTable_019dfe5a-cf00-76d7-9209-996217c48df5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019dfe5a-cf00-7558-b66b-020976296a41" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019dfe5a-cf00-76d7-9209-996217c48df5" xlink:to="loc_dei_LegalEntityAxis_019dfe5a-cf00-7558-b66b-020976296a41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019dfe5a-cf00-7558-b66b-020976296a41_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019dfe5a-cf00-7558-b66b-020976296a41" xlink:to="loc_dei_EntityDomain_019dfe5a-cf00-7558-b66b-020976296a41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019dfe5a-cf00-735a-ab38-3742c9e9daaa" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019dfe5a-cf00-7558-b66b-020976296a41" xlink:to="loc_dei_EntityDomain_019dfe5a-cf00-735a-ab38-3742c9e9daaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019dfe5a-cf00-7f77-9c4a-1d689270e9d4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_DocumentType_019dfe5a-cf00-7f77-9c4a-1d689270e9d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019dfe5a-cf00-7847-9586-929567740d76" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_DocumentQuarterlyReport_019dfe5a-cf00-7847-9586-929567740d76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019dfe5a-cf00-7788-9068-7e6f1e32b3fe" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_AmendmentFlag_019dfe5a-cf00-7788-9068-7e6f1e32b3fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019dfe5a-cf00-737d-9bea-41ba43768541" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_DocumentPeriodEndDate_019dfe5a-cf00-737d-9bea-41ba43768541" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019dfe5a-cf00-74cb-a6ba-7c3629f7a64a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_DocumentTransitionReport_019dfe5a-cf00-74cb-a6ba-7c3629f7a64a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019dfe5a-cf00-76b3-8642-93fc7be78798" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_DocumentFiscalYearFocus_019dfe5a-cf00-76b3-8642-93fc7be78798" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019dfe5a-cf00-71ac-b530-f704fbfdbf3d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019dfe5a-cf00-71ac-b530-f704fbfdbf3d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019dfe5a-cf00-7255-8041-a46b7d2c1ed5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityFileNumber_019dfe5a-cf00-7255-8041-a46b7d2c1ed5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019dfe5a-cf00-7c1b-954c-740af381e68a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityRegistrantName_019dfe5a-cf00-7c1b-954c-740af381e68a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019dfe5a-cf00-7e9f-a677-9bef71bce277" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityCentralIndexKey_019dfe5a-cf00-7e9f-a677-9bef71bce277" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019dfe5a-cf00-7468-8776-0d70d4820d57" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019dfe5a-cf00-7468-8776-0d70d4820d57" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019dfe5a-cf00-7b48-97b9-74158d3cad80" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityTaxIdentificationNumber_019dfe5a-cf00-7b48-97b9-74158d3cad80" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019dfe5a-cf00-7774-885d-b9b5568d3fa0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityAddressAddressLine1_019dfe5a-cf00-7774-885d-b9b5568d3fa0" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019dfe5a-cf00-79ac-9677-aaf2076ce150" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityAddressCityOrTown_019dfe5a-cf00-79ac-9677-aaf2076ce150" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019dfe5a-cf00-7358-83b8-69aeab095f1f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityAddressStateOrProvince_019dfe5a-cf00-7358-83b8-69aeab095f1f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019dfe5a-cf00-7749-ab78-38d98a6383af" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityAddressPostalZipCode_019dfe5a-cf00-7749-ab78-38d98a6383af" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019dfe5a-cf00-7914-aee3-8acd8c1222c8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_CityAreaCode_019dfe5a-cf00-7914-aee3-8acd8c1222c8" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019dfe5a-cf00-7486-b0fc-0b0c68ebad62" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_LocalPhoneNumber_019dfe5a-cf00-7486-b0fc-0b0c68ebad62" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019dfe5a-cf00-786a-b7b2-45c8b8c2f42f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_CurrentFiscalYearEndDate_019dfe5a-cf00-786a-b7b2-45c8b8c2f42f" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019dfe5a-cf00-7358-bad9-7c378d906934" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityCurrentReportingStatus_019dfe5a-cf00-7358-bad9-7c378d906934" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019dfe5a-cf00-73d8-ad1c-7a08b51542d3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityInteractiveDataCurrent_019dfe5a-cf00-73d8-ad1c-7a08b51542d3" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019dfe5a-cf00-7021-b50f-215227497d27" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityFilerCategory_019dfe5a-cf00-7021-b50f-215227497d27" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019dfe5a-cf00-7f1a-9e9d-e8e9c52e8c41" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntitySmallBusiness_019dfe5a-cf00-7f1a-9e9d-e8e9c52e8c41" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019dfe5a-cf00-71a4-8b12-ba2e9766e7fb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityEmergingGrowthCompany_019dfe5a-cf00-71a4-8b12-ba2e9766e7fb" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019dfe5a-cf00-7da4-997d-f9338f0a919e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityShellCompany_019dfe5a-cf00-7da4-997d-f9338f0a919e" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019dfe5a-cf00-7343-89c9-03fadd14ae76" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019dfe5a-cf00-7f03-a0fe-fbb7f963b684" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019dfe5a-cf00-7343-89c9-03fadd14ae76" xlink:type="arc" order="25"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITYCONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="ck0000081061-20260627.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_019dfe5a-cfb3-7cab-9104-7b5f3beb1fee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019dfe5a-cfb3-7714-b729-e8589ded3112" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019dfe5a-cfb3-7cab-9104-7b5f3beb1fee" xlink:to="loc_us-gaap_StatementTable_019dfe5a-cfb3-7714-b729-e8589ded3112" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019dfe5a-cfb3-785d-924f-bee47eb6e701" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019dfe5a-cfb3-7714-b729-e8589ded3112" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019dfe5a-cfb3-785d-924f-bee47eb6e701" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-785d-924f-bee47eb6e701_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019dfe5a-cfb3-785d-924f-bee47eb6e701" xlink:to="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-785d-924f-bee47eb6e701_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e84-a587-a2adbd20619c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019dfe5a-cfb3-785d-924f-bee47eb6e701" xlink:to="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e84-a587-a2adbd20619c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019dfe5a-cfb3-7680-acf0-a31fa89cdf35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e84-a587-a2adbd20619c" xlink:to="loc_us-gaap_CommonStockMember_019dfe5a-cfb3-7680-acf0-a31fa89cdf35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019dfe5a-cfb3-7e32-a8dc-706a9997fc6a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e84-a587-a2adbd20619c" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019dfe5a-cfb3-7e32-a8dc-706a9997fc6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019dfe5a-cfb3-7107-8b46-f1451c46434c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e84-a587-a2adbd20619c" xlink:to="loc_us-gaap_RetainedEarningsMember_019dfe5a-cfb3-7107-8b46-f1451c46434c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019dfe5a-cfb3-7088-bbb7-fe65d9e6af6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e84-a587-a2adbd20619c" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019dfe5a-cfb3-7088-bbb7-fe65d9e6af6d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019dfe5a-cfb3-73da-937a-3fa64c74d492" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e84-a587-a2adbd20619c" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019dfe5a-cfb3-73da-937a-3fa64c74d492" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_CommonStockRelatedToEsopMember_019dfe5a-cfb3-7e6f-aeb2-ecf4af73e1ec" xlink:href="ck0000081061-20260627.xsd#ck0000081061_CommonStockRelatedToEsopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e84-a587-a2adbd20619c" xlink:to="loc_ck0000081061_CommonStockRelatedToEsopMember_019dfe5a-cfb3-7e6f-aeb2-ecf4af73e1ec" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019dfe5a-cfb3-7fa2-90a9-46e6eeffd3bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dfe5a-cfb3-7cab-9104-7b5f3beb1fee" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019dfe5a-cfb3-7fa2-90a9-46e6eeffd3bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019dfe5a-cfb3-7909-80c6-cb1404547a06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019dfe5a-cfb3-7fa2-90a9-46e6eeffd3bd" xlink:to="loc_us-gaap_StockholdersEquity_019dfe5a-cfb3-7909-80c6-cb1404547a06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019dfe5a-cfb3-7d0d-9400-a7b8b8836ea7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019dfe5a-cfb3-7fa2-90a9-46e6eeffd3bd" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_019dfe5a-cfb3-7d0d-9400-a7b8b8836ea7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_019dfe5a-cfb3-706d-9a7e-d7f70588b190" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019dfe5a-cfb3-7fa2-90a9-46e6eeffd3bd" xlink:to="loc_us-gaap_DividendsCommonStock_019dfe5a-cfb3-706d-9a7e-d7f70588b190" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_019dfe5a-cfb3-761c-9636-b707e4c2e576" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019dfe5a-cfb3-7fa2-90a9-46e6eeffd3bd" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_019dfe5a-cfb3-761c-9636-b707e4c2e576" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019dfe5a-cfb3-7244-9116-8678410a53b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019dfe5a-cfb3-7fa2-90a9-46e6eeffd3bd" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019dfe5a-cfb3-7244-9116-8678410a53b6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019dfe5a-cfb3-7025-bc54-08c1a422338d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019dfe5a-cfb3-7fa2-90a9-46e6eeffd3bd" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019dfe5a-cfb3-7025-bc54-08c1a422338d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease_019dfe5a-cfb3-7da8-9e42-306636f1606c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019dfe5a-cfb3-7fa2-90a9-46e6eeffd3bd" xlink:to="loc_us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease_019dfe5a-cfb3-7da8-9e42-306636f1606c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019dfe5a-cfb3-757c-a2f3-78dd1804b87c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/FairValueMeasurementsforInvestmentsDetails" xlink:type="simple" xlink:href="ck0000081061-20260627.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_019dfe5a-cfb3-706b-8dce-6593ee790868" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019dfe5a-cfb3-7067-ab92-17c246c8e8c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019dfe5a-cfb3-706b-8dce-6593ee790868" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019dfe5a-cfb3-7067-ab92-17c246c8e8c1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019dfe5a-cfb3-77a1-9665-b69cbd1064e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019dfe5a-cfb3-7067-ab92-17c246c8e8c1" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019dfe5a-cfb3-77a1-9665-b69cbd1064e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019dfe5a-cfb3-77a1-9665-b69cbd1064e3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019dfe5a-cfb3-77a1-9665-b69cbd1064e3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019dfe5a-cfb3-77a1-9665-b69cbd1064e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019dfe5a-cfb3-7479-b6f6-45366630142a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019dfe5a-cfb3-77a1-9665-b69cbd1064e3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019dfe5a-cfb3-7479-b6f6-45366630142a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019dfe5a-cfb3-727d-8062-f68dadd81a36" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019dfe5a-cfb3-7479-b6f6-45366630142a" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019dfe5a-cfb3-727d-8062-f68dadd81a36" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019dfe5a-cfb3-7f27-b901-ba3167b20298" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019dfe5a-cfb3-7479-b6f6-45366630142a" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019dfe5a-cfb3-7f27-b901-ba3167b20298" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019dfe5a-cfb3-7ed8-a9c3-8c92ef63430a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019dfe5a-cfb3-7479-b6f6-45366630142a" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019dfe5a-cfb3-7ed8-a9c3-8c92ef63430a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecurities_019dfe5a-cfb3-7114-96b5-b65bbe471967" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MarketableSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019dfe5a-cfb3-706b-8dce-6593ee790868" xlink:to="loc_us-gaap_MarketableSecurities_019dfe5a-cfb3-7114-96b5-b65bbe471967" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/AvailableforSaleDebtSecuritiesReconciliationDetails" xlink:type="simple" xlink:href="ck0000081061-20260627.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_019dfe5a-cfb3-7874-9ad2-c9f64610e604" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019dfe5a-cfb3-7e49-9a58-032dd2f32b75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019dfe5a-cfb3-7874-9ad2-c9f64610e604" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019dfe5a-cfb3-7e49-9a58-032dd2f32b75" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-72c4-ae68-3369f9f8af32" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019dfe5a-cfb3-7e49-9a58-032dd2f32b75" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-72c4-ae68-3369f9f8af32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-72c4-ae68-3369f9f8af32_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-72c4-ae68-3369f9f8af32" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-72c4-ae68-3369f9f8af32_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-76ec-a8c9-b4e336fe836b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-72c4-ae68-3369f9f8af32" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-76ec-a8c9-b4e336fe836b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019dfe5a-cfb3-74b0-9e10-305d0e71977f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-76ec-a8c9-b4e336fe836b" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019dfe5a-cfb3-74b0-9e10-305d0e71977f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_DebtSecuritiesRestrictedMember_019dfe5a-cfb3-7f4d-acc5-e76b98a11c46" xlink:href="ck0000081061-20260627.xsd#ck0000081061_DebtSecuritiesRestrictedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-76ec-a8c9-b4e336fe836b" xlink:to="loc_ck0000081061_DebtSecuritiesRestrictedMember_019dfe5a-cfb3-7f4d-acc5-e76b98a11c46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019dfe5a-cfb3-7184-98ea-cabbd2bbbe77" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019dfe5a-cfb3-7874-9ad2-c9f64610e604" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019dfe5a-cfb3-7184-98ea-cabbd2bbbe77" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_019dfe5a-cfb3-7801-afec-898e39683526" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019dfe5a-cfb3-7874-9ad2-c9f64610e604" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_019dfe5a-cfb3-7801-afec-898e39683526" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_019dfe5a-cfb3-7577-a325-ae15f84bc697" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019dfe5a-cfb3-7874-9ad2-c9f64610e604" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_019dfe5a-cfb3-7577-a325-ae15f84bc697" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019dfe5a-cfb3-70f2-b226-d8fbffb58f5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019dfe5a-cfb3-7874-9ad2-c9f64610e604" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019dfe5a-cfb3-70f2-b226-d8fbffb58f5e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/TemporarilyImpairedAvailableforSaleDebtSecuritiesbyTimePeriodImpairedDetails" xlink:type="simple" xlink:href="ck0000081061-20260627.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_019dfe5a-cfb3-7c09-975b-cfd3716bf0a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019dfe5a-cfb3-75ac-9d32-7a7d0e1b4880" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019dfe5a-cfb3-7c09-975b-cfd3716bf0a3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019dfe5a-cfb3-75ac-9d32-7a7d0e1b4880" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-7d40-b6b8-92972db55811" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019dfe5a-cfb3-75ac-9d32-7a7d0e1b4880" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-7d40-b6b8-92972db55811" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7d40-b6b8-92972db55811_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-7d40-b6b8-92972db55811" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7d40-b6b8-92972db55811_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7056-a61a-fb56294eba39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-7d40-b6b8-92972db55811" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7056-a61a-fb56294eba39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019dfe5a-cfb3-7974-9189-fa2831a6bd15" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7056-a61a-fb56294eba39" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019dfe5a-cfb3-7974-9189-fa2831a6bd15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_DebtSecuritiesRestrictedMember_019dfe5a-cfb3-78c9-8bf6-1de5d25cbf5e" xlink:href="ck0000081061-20260627.xsd#ck0000081061_DebtSecuritiesRestrictedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7056-a61a-fb56294eba39" xlink:to="loc_ck0000081061_DebtSecuritiesRestrictedMember_019dfe5a-cfb3-78c9-8bf6-1de5d25cbf5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019dfe5a-cfb3-7fd6-8c4e-7b3510cd75e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019dfe5a-cfb3-7c09-975b-cfd3716bf0a3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019dfe5a-cfb3-7fd6-8c4e-7b3510cd75e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019dfe5a-cfb3-7a6b-be75-575aedd5db72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019dfe5a-cfb3-7c09-975b-cfd3716bf0a3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019dfe5a-cfb3-7a6b-be75-575aedd5db72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019dfe5a-cfb3-7009-abbd-316ebb205fe9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019dfe5a-cfb3-7c09-975b-cfd3716bf0a3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019dfe5a-cfb3-7009-abbd-316ebb205fe9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019dfe5a-cfb3-76dd-bd04-db910ffbe545" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019dfe5a-cfb3-7c09-975b-cfd3716bf0a3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019dfe5a-cfb3-76dd-bd04-db910ffbe545" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019dfe5a-cfb3-74e8-a687-84d8eab7ccda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019dfe5a-cfb3-7c09-975b-cfd3716bf0a3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019dfe5a-cfb3-74e8-a687-84d8eab7ccda" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019dfe5a-cfb3-736c-8098-6164a71a12c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_019dfe5a-cfb3-7c09-975b-cfd3716bf0a3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019dfe5a-cfb3-736c-8098-6164a71a12c9" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/InvestmentsEquitySecuritiesDetails" xlink:type="simple" xlink:href="ck0000081061-20260627.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_019dfe5a-cfb3-7120-9dc3-c03772612f93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesTable_019dfe5a-cfb3-7ff4-9ff0-5153f80d8d4f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MarketableSecuritiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019dfe5a-cfb3-7120-9dc3-c03772612f93" xlink:to="loc_us-gaap_MarketableSecuritiesTable_019dfe5a-cfb3-7ff4-9ff0-5153f80d8d4f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-7a54-a257-b3704a542548" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketableSecuritiesTable_019dfe5a-cfb3-7ff4-9ff0-5153f80d8d4f" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-7a54-a257-b3704a542548" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7a54-a257-b3704a542548_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-7a54-a257-b3704a542548" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7a54-a257-b3704a542548_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7905-9c08-ce9d46f65cd5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019dfe5a-cfb3-7a54-a257-b3704a542548" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019dfe5a-cfb3-7905-9c08-ce9d46f65cd5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019dfe5a-cfb3-75b0-934b-cfb2477f5446" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019dfe5a-cfb3-7120-9dc3-c03772612f93" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019dfe5a-cfb3-75b0-934b-cfb2477f5446" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/AccumulatedOtherComprehensiveEarningsLossesDetails" xlink:type="simple" xlink:href="ck0000081061-20260627.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_019dfe5a-cfb3-752d-8f16-4ad78c36688e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019dfe5a-cfb3-7b42-822d-450d25f6987a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_019dfe5a-cfb3-752d-8f16-4ad78c36688e" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019dfe5a-cfb3-7b42-822d-450d25f6987a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019dfe5a-cfb3-751c-8a3f-a87861932aa8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019dfe5a-cfb3-7b42-822d-450d25f6987a" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019dfe5a-cfb3-751c-8a3f-a87861932aa8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-751c-8a3f-a87861932aa8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019dfe5a-cfb3-751c-8a3f-a87861932aa8" xlink:to="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-751c-8a3f-a87861932aa8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e52-ab48-0b6ad08247a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019dfe5a-cfb3-751c-8a3f-a87861932aa8" xlink:to="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e52-ab48-0b6ad08247a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_019dfe5a-cfb3-7ed3-8da1-b98931b712af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e52-ab48-0b6ad08247a0" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_019dfe5a-cfb3-7ed3-8da1-b98931b712af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_019dfe5a-cfb3-7af3-a3cc-f9149cb420a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e52-ab48-0b6ad08247a0" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_019dfe5a-cfb3-7af3-a3cc-f9149cb420a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019dfe5a-cfb3-7280-ab0e-376bd9f5c03b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019dfe5a-cfb3-7e52-ab48-0b6ad08247a0" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019dfe5a-cfb3-7280-ab0e-376bd9f5c03b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019dfe5a-cfb3-7f67-b759-7b511ec7d77c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_019dfe5a-cfb3-752d-8f16-4ad78c36688e" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019dfe5a-cfb3-7f67-b759-7b511ec7d77c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019dfe5a-cfb3-7880-8a33-44263bb98c7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019dfe5a-cfb3-7f67-b759-7b511ec7d77c" xlink:to="loc_us-gaap_StockholdersEquity_019dfe5a-cfb3-7880-8a33-44263bb98c7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_019dfe5a-cfb3-7f32-b57c-9b754b43a150" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019dfe5a-cfb3-7f67-b759-7b511ec7d77c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_019dfe5a-cfb3-7f32-b57c-9b754b43a150" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_019dfe5a-cfb3-7024-b043-df7fe8e96c69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019dfe5a-cfb3-7f67-b759-7b511ec7d77c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_019dfe5a-cfb3-7024-b043-df7fe8e96c69" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_019dfe5a-cfb3-7c3d-8c93-acd06081dfe6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019dfe5a-cfb3-7f67-b759-7b511ec7d77c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_019dfe5a-cfb3-7c3d-8c93-acd06081dfe6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019dfe5a-cfb3-7135-8a8e-7e22ff372aa5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019dfe5a-cfb3-7f67-b759-7b511ec7d77c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019dfe5a-cfb3-7135-8a8e-7e22ff372aa5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019dfe5a-cfb3-70a6-98d6-47c26490555e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/SubsequentEventDetails" xlink:type="simple" xlink:href="ck0000081061-20260627.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_019dfe5a-cfb3-7f3c-821a-635fbe237bfe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_019dfe5a-cfb3-7e08-b50c-f0ee85091492" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_019dfe5a-cfb3-7f3c-821a-635fbe237bfe" xlink:to="loc_us-gaap_SubsequentEventTable_019dfe5a-cfb3-7e08-b50c-f0ee85091492" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019dfe5a-cfb3-7cc2-a6f3-c43493675bd2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019dfe5a-cfb3-7e08-b50c-f0ee85091492" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019dfe5a-cfb3-7cc2-a6f3-c43493675bd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019dfe5a-cfb3-7cc2-a6f3-c43493675bd2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019dfe5a-cfb3-7cc2-a6f3-c43493675bd2" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019dfe5a-cfb3-7cc2-a6f3-c43493675bd2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019dfe5a-cfb3-7ed7-a560-02b9fd0ce84a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019dfe5a-cfb3-7cc2-a6f3-c43493675bd2" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019dfe5a-cfb3-7ed7-a560-02b9fd0ce84a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019dfe5a-cfb3-7ce2-bc1a-c869bed3d94a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019dfe5a-cfb3-7ed7-a560-02b9fd0ce84a" xlink:to="loc_us-gaap_SubsequentEventMember_019dfe5a-cfb3-7ce2-bc1a-c869bed3d94a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsAxis_019dfe5a-cfb3-7c03-8f62-1311be9ba5e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019dfe5a-cfb3-7e08-b50c-f0ee85091492" xlink:to="loc_us-gaap_DividendsAxis_019dfe5a-cfb3-7c03-8f62-1311be9ba5e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_019dfe5a-cfb3-7c03-8f62-1311be9ba5e4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DividendsAxis_019dfe5a-cfb3-7c03-8f62-1311be9ba5e4" xlink:to="loc_us-gaap_DividendsDomain_019dfe5a-cfb3-7c03-8f62-1311be9ba5e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_019dfe5a-cfb3-7c6c-bb8d-19ca200b522b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DividendsAxis_019dfe5a-cfb3-7c03-8f62-1311be9ba5e4" xlink:to="loc_us-gaap_DividendsDomain_019dfe5a-cfb3-7c6c-bb8d-19ca200b522b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_O2026Q2DividendsMember_019dfe5a-cfb3-7147-839f-0052c86ad24e" xlink:href="ck0000081061-20260627.xsd#ck0000081061_O2026Q2DividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_019dfe5a-cfb3-7c6c-bb8d-19ca200b522b" xlink:to="loc_ck0000081061_O2026Q2DividendsMember_019dfe5a-cfb3-7147-839f-0052c86ad24e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_019dfe5a-cfb3-7f9a-bc08-1fdd2e780fc9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPayableDateDeclaredDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019dfe5a-cfb3-7f3c-821a-635fbe237bfe" xlink:to="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_019dfe5a-cfb3-7f9a-bc08-1fdd2e780fc9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_019dfe5a-cfb3-7c3c-8a05-c1b70f74b33f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019dfe5a-cfb3-7f3c-821a-635fbe237bfe" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_019dfe5a-cfb3-7c3c-8a05-c1b70f74b33f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_019dfe5a-cfb3-7f48-9d86-ec7610321dc6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019dfe5a-cfb3-7f3c-821a-635fbe237bfe" xlink:to="loc_us-gaap_DividendsCommonStockCash_019dfe5a-cfb3-7f48-9d86-ec7610321dc6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_019dfe5a-cfb3-7866-bd1f-34ac769743c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendPayableDateToBePaidDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019dfe5a-cfb3-7f3c-821a-635fbe237bfe" xlink:to="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_019dfe5a-cfb3-7866-bd1f-34ac769743c7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_019dfe5a-cfb3-7837-a064-eb30123d274c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019dfe5a-cfb3-7f3c-821a-635fbe237bfe" xlink:to="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_019dfe5a-cfb3-7837-a064-eb30123d274c" xlink:type="arc" order="4"/>
  </link:definitionLink>
</link:linkbase>
