having great power or force or potency or effect; "the most powerful government in western Europe"; "his powerful arms"; "a powerful bomb"; "the horse's powerful kick"; "powerful drugs"; "a powerful argument"
a person who behaves in an tyrannical manner; "my boss is a dictator who makes everyone work overtime"
characteristic of an absolute ruler or absolute rule; having absolute sovereignty; "an authoritarian regime"; "autocratic government"; "despotic rulers"; "a dictatorial rule that lasted for the duration of the war"; "a tyrannical government"
expecting unquestioning obedience; "he was imperious and dictatorial"; "the timid child of authoritarian parents"; "insufferably overbearing behavior toward the waiter"