PLUMMY Meaning of PLUMMY in English ■ adjective ( plummier , plummiest ) 1》 resembling a plum. 2》 Brit. informal (of a person's voice) typical of the English upper classes. 3》 Brit. informal choice; highly desirable. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004