The principle of complete and unrestricted power in government WordNet 3.0

An ideological belief in the complete and unrestricted power of government. Open English WordNet

Totalitarianism is a form of government and a political system that prohibits all opposition parties, outlaws individual and group opposition to the state and its claims, and exercises an extremely high if not complete degree of control and regulation over public and private life. Wikipedia

Political system in which the state holds total authority Wikidata

A social, economic and/or political system in which some authority (e.g. the state or "the market") wields absolute power; totalitarianism. Wiktionary