[czar] n [NL czar, fr. Russ tsar', fr. ORuss tsisari, fr. Goth kaisar, fr. Gk or L; Gk, fr. L Caesar--more at caesar] (1555) 1: emperor; specif: the ruler of Russia until the 1917 revolution
2: one having great power or authority "a banking ~" -- czar.dom n