Dictator

1. (n.) One who dictates; one who prescribes rules and maxims authoritatively for the direction of others.

2. (n.) One invested with absolute authority; especially, a magistrate created in times of exigence and distress, and invested with unlimited power.

Thesaurus Entries

Simon Legree, absolute monarch, absolute ruler, all-powerful ruler, arrogator, autarch, authoritarian, authoritative, autocrat, caesar, commissar, czar, despot, disciplinarian, doctrinaire, driver, duce, hard master, martinet, oligarch, oppressor, overlord, pharaoh, slave driver, stern, stickler, strong man, tyrant, usurper, warlord