The definition of autocracy means a country, city, or other area is ruled over by one person who has total control.A monarchy is an example ofan autocracy. 1  government in which one person has absolute power; dictatorship; despotism. 2  pl. -· 3 cies a country with this kind of government.he definition of autocracy means a country, city, or other area is ruled over by one person who has total control.