a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.)
source: WordNet 3.0
dominance through threat of punishment and violence
source: WordNet 3.0
The government or authority of a tyrant; a country governed by an absolute ruler; hence, arbitrary or despotic exercise of power; exercise of power over subjects and others with a rigor not authorized by law or justice, or not requisite for the purposes of government.