Definitions

1. adjective

characterized by or showing a desire for and exercise of power over others in a cruel and unfair way

“The tyrannical leader ruled the country with an iron fist.”

2. adverb

in a tyrannical manner

“The tyrannical government oppressed its citizens with ruthless efficiency.”

3. noun

a person or organization that exercises power in a cruel and unfair way

“The tyrannical regime was overthrown by a popular uprising.”