[ noun ] a male monarch or emperor (especially of Russia prior to 1917) <noun.person>
Tzar \Tzar\, n. The emperor of Russia. See {Czar}.
czar \czar\ (z["a]r), n. [Russ. tsare, fr. L. Caesar C[ae]sar; cf. OPol. czar, Pol. car. ] A king; a chief; the title of the emperor of Russia. [Written also {tsar} and {tzar}.]