A tyrannical ruler wields absolute power and authority, and often wields that power unjustly, cruelly, or oppressively.

First used in the 1530s, the adjective tyrannical stems from the late-14th-century word tyranny, meaning "cruel or unjust use of power," which has origins in the Greek work tyrannos, meaning "master." Tyrannical rule is the opposite of democratic rule, which places the power in the people, the majority of whom makes the decisions. Adolf Hitler, Benito Mussolini, and Joseph Stalin are three examples of the 20th century's most tyrannical dictators.

Definitions of tyrannical

adj characteristic of an absolute ruler or absolute rule; having absolute sovereignty

“a tyrannical government”
authoritarian, autocratic, despotic, dictatorial, tyrannic
not in agreement with or according to democratic doctrine or practice or ideals

adj marked by unjust severity or arbitrary behavior

“a tyrannical parent”
oppressive, tyrannous
tending to domineer

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