Entry 1 sense Webster, 1913 Oleraceous · Ol·er·a·ceous · IPA /əʊləˈɹeɪʃəs/ 01 a. Pertaining to pot herbs; of the nature or having the qualities of herbs for cookery; esculent. 1. Pertaining to pot herbs; of the nature or having the qualities of herbs for cookery; esculent.