n.
Variant: also tsar or tzar
Pronunciation: ' zär, ' (t)sär
Function: noun
Etymology: New Latin czar, from Russian tsar', from Old Russian ts ĭ sar ĭ , 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 \ ' zär-d ə m, ' (t)sär- \ noun