authoritarian, dictator -- (a person who behaves in a tyrannical manner; "my boss is a dictator who makes everyone work overtime")
Overview of adj authoritarian
The adj authoritarian has 2 senses
authoritarian, autocratic, dictatorial, despotic, tyrannic, tyrannical -- (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")
authoritarian, dictatorial, overbearing -- (expecting unquestioning obedience; "the timid child of authoritarian parents"; "insufferably overbearing behavior toward the waiter")