PROSAIST Meaning of PROSAIST in English [ 'prəʊzeɪɪst ]■ noun1》 a person who writes in prose. 2》 a prosaic person.Derivativesprosaism noun OriginC19: from Fr. prosaïste , from L. prosa (see prose ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004