ACUITY Meaning of ACUITY in English [ ə'kju:ɪti ]■ noun sharpness or keenness of thought, vision, or hearing.OriginME: from OFr. acuite or med. L. acuitas , from L. acuere (see acute ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004