PROSY Meaning of PROSY in English adjective 1.Synonyms: prosaic 1, matter-of-fact, prose, prosing 2.Synonyms: colorless 2, drab, dull, flat, lackluster, lifeless, lusterless, prosaic Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003