behaves like a tyrant
- feature of a complete ruler or absolute rule having absolute sovereignty of governing bodies or rulers as an authoritarian regime
- anticipating unquestioning obedience
- characteristic of a complete ruler or absolute guideline; having absolute sovereignty
- someone who behaves in a tyrannical way
1862, "favoring imposed order over freedom," from authority + -an. Compare authoritative, which initially had this meaning to it self. Noun when you look at the sense of one advocating or practicing these types of governance is from 1859.
I'm not authoritarian by nature but I knew there was a desperate need for leadership of our group.