PLUMB Meaning of PLUMB in English v. 1 tr. provide (a building or room etc.) with plumbing. 2 tr. (often foll. by in) fit as part of a plumbing system. 3 intr. work as a plumber. [ back-form. f. PLUMBER ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012