Quick definitions from WordNet (dictatorial)
▸ adjective: of or characteristic of a dictator ("Dictatorial powers")
▸ adjective: likened to a dictator in severity
▸ adjective: expecting unquestioning obedience ("He was imperious and dictatorial")
▸ adjective: characteristic of an absolute ruler or absolute rule; having absolute sovereignty ("A dictatorial rule that lasted for the duration of the war")
▸ Also see dictatorial
▸ adjective: of or characteristic of a dictator ("Dictatorial powers")
▸ adjective: likened to a dictator in severity
▸ adjective: expecting unquestioning obedience ("He was imperious and dictatorial")
▸ adjective: characteristic of an absolute ruler or absolute rule; having absolute sovereignty ("A dictatorial rule that lasted for the duration of the war")
▸ Also see dictatorial