CITADEL Meaning of CITADEL in English n. 1 a fortress, usu. on high ground protecting or dominating a city. 2 a meeting-hall of the Salvation Army. [ F citadelle or It. citadella, ult. f. L civitas -tatis city ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012