n.
 (pl. tyrannies)
   - cruel and oppressive government or rule. ▸a state under such rule. 
- cruel and arbitrary exercise of power or control.
- (especially in ancient Greece) rule by a tyrant.
Derivative
  
    - tyrannical adj.
- tyrannically adv.
- tyrannize
 or tyrannise v.
- tyrannous adj.
- tyrannously adv.
 
  Etymology
  ME: from OFr. tyrannie, from late L. tyrannia, from L. turannus (see tyrant).