is a specific kind of: crowned head, monarch, sovereign.

instances of which are: Aleksandr Pavlovich, Alexander I, Czar Alexander I | Alexander II, Alexander the Liberator, Czar Alexander II | Alexander III, Czar Alexander III | Boris Fyodorovich Godunov, Boris Godunov, Godunov | Ivan IV, Ivan Iv Vasilievich, Ivan the Terrible | Czar Nicholas I, Nicholas I | Nicholas II | Czar Peter I, Peter I, Peter the Great.

domain region: Russia.

derivation: czarist, czaristic, tsarist, tsaristic, tzarist.