INMATE Meaning of INMATE in English n. (usu. foll. by of) 1 an occupant of a hospital, prison, institution, etc. 2 an occupant of a house etc., esp. one of several. [ prob. orig. INN + MATE(1), assoc. with IN ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012