(plural: ‘authoritarians‘; for the right pronunciation, please click here)
a person who believes that rules, regulations and laws should be obeyed without question whether they are right or wrong;
a ruler with complete authority and control;
a dictator; a tyrant; an autocrat;
a person who expects others to follow him/her without question,
As he grew older and more powerful, John became an authoritarian and hated by everyone!
An authoritarian can enjoy the power of his/her authority only for a short time because sooner or later, the people rebel against him/her.
Hitler of former Nazi Germany in the past and President Megawati Sukarnoputri of Indonesia in the recent times are alleged to be authoritarians who lost their positions due to excessive use of their authority.