WordWeb Online

1. Expecting unquestioning obedience
   - authoritarian, overbearing
    
2. Characteristic of an absolute ruler or absolute rule; having absolute sovereignty
   "a dictatorial rule that lasted for the duration of the war";
   - authoritarian, autocratic, despotic, tyrannic, tyrannical
    
3. Of or characteristic of a dictator
   "dictatorial powers"

See also: domineering, undemocratic

Encyclopedia: Dictatorial