TSAR Meaning of TSAR in English n. (also czar) 1 hist. the title of the former emperor of Russia. 2 a person with great authority. tsardom n. tsarism n. tsarist n.[ Russ. tsar', ult. f. L Caesar ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012