antonomasia UK /ˌæntənəʊˈmeɪzɪə/US /ˌæntənəˈmeɪʒə/ noun2 •(rhetoric) The substitution of an epithet or title in place of a proper noun. •(rhetoric) Use of a proper name to suggest its most obvious quality or aspect.Antonomasia proper names imparts From kindred, country, epithets, and arts. — 1835 formsantonomasias