▪ a person exercising power or control in a cruel, unreasonable, or arbitrary way: "her father was a tyrant and a bully"Similarslave drivermartinethard taskmasterscourgebully
▪ (especially in ancient Greece) a ruler who seized absolute power without legal right.
2. a tyrant flycatcher.
Word OriginMiddle English: from Old French, via Latin from Greek turannos.