ruler
1. [ noun ] a person who rules or commands
Synonyms: swayer
Examples:

"swayer of the universe"

Related terms: person overlord sovereign basileus sultan caliph Kublai_Kahn oligarch Mogul khan Pharaoh Bourbon Inca dynast regent sheik Tamerlane hakim emir puppet_leader dictator tyrant govern
2. [ noun ] measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths
Synonyms: rule
Related terms: measure foot_rule meterstick yardstick carpenter's_rule rule