Entry 1 sense Webster, 1913 Patrimonial /păt'-rəm-ōnˌ-yəl/ · Pat·ri·mo·ni·al · IPA /ˌpætɹɪˈmoʊni.əl/ 01 a. Of or pertaining to a patrimony; inherited from ancestors; as, a patrimonial estate. 1. Of or pertaining to a patrimony; inherited from ancestors; as, a patrimonial estate.