- 1 unfair or cruel use of power or authority a victim of oppression and tyranny The children had no protection against the tyranny of their father. the tyrannies of Nazi rule (figurative) These days it seems we must all submit to the tyranny of the automobile.
- 2the rule of a tyrant; a country under this rule synonym dictatorship Any political system refusing to allow dissent becomes a tyranny.
NAmE//ˈtɪrəni//(pl. tyrannies) [uncountable, countable]