tyr·an·ny/ˈtɪr ə ni
noun, plural tyr·an·nies.
1. arbitrary or unrestrained exercise of power; despotic abuse of authority.
2. the government or rule of a tyrant or absolute ruler.
3. a state ruled by a tyrant or absolute ruler.
4. oppressive or unjustly severe government on the part of any ruler.
5. undue severity or harshness.