ty·rant / ˈtīrənt/ • n. 1. a cruel and oppressive ruler: the tyrant was deposed by popular demonstrations. ∎ a person exercising power or control in a cruel, unreasonable, or arbitrary way: her father was a tyrant and a bully. ∎ (esp. in ancient Greece) a ruler who seized power without legal right. 2. a tyrant flycatcher.
So or hence tyrannic XV. — (O)F. tyrannical XVI. tyrannous XV. tyranny XIV. — (O)F. tyrannie — late L. tyrannia — Gr. turanníā. tyrannize XV. — (O)F. tyranniser.