Main Entry: czar

Variant(s): also tsar or tzar \ˈzär, ˈ(t)sär\

Function: noun

Etymology: New Latin czar, from Russian tsar', from Old Russian tsĭsarĭ, from Gothic kaisar, from Greek or Latin; Greek, from Latin Caesar — more at caesar

Date: 1555

1 : emperor; specifically : the ruler of Russia until the 1917 revolution
2 : one having great power or authority <a banking czar>

— czar·dom also tsar·dom or tzar·dom \ˈzär-dəm, ˈ(t)sär-\ noun