INGRATE Meaning of INGRATE in English [ 'ɪngreɪt , ɪn'greɪt ]formal or literary■ noun an ungrateful person. ■ adjective ungrateful.OriginME: from L. ingratus , from in- 'not' + gratus 'grateful'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004