Pronunciation: (tir'u-nē),[key] —n., —pl.-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.
6. a tyrannical act or proceeding.