WordReference Random House Learner's Dictionary of American English © 2017
tyr•an•nize /ˈtɪrəˌnaɪz/USA pronunciation   v.,  -nized, -niz•ing. 
  1. Governmentto rule tyrannically: [+ object]to tyrannize his countrymen.[no object]to tyrannize over the country.

WordReference Random House Unabridged Dictionary of American English © 2017
tyr•an•nize  (tirə nīz′),USA pronunciation v.,  -nized, -niz•ing. 
  1. to exercise absolute power or control, esp. cruelly or oppressively (often fol. by over).
  2. to govern despotically, cruelly, or oppressively.
  3. to govern or reign as a tyrant.

  1. to rule or govern tyrannically;
    treat oppressively.
Also,[esp. Brit.,] tyran•nise′.  tyran•niz′er, n. 
tyran•niz′ing•ly, adv. 
  • Late Latin tyrannizāre, equivalent. to tyrann(us) tyrant + -izāre -ize
  • French tyranniser
  • 1485–95

Collins Concise English Dictionary © HarperCollins Publishers::

tyrannize, tyrannise /ˈtɪrəˌnaɪz/ vb
  1. when intr, often followed by over: to rule or exercise power (over) in a cruel or oppressive manner

ˈtyranˌnizer, ˈtyranˌniser n

'tyrannise' also found in these entries:

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