a person who rules or governs; sovereign.

Also, rule. a strip of wood, metal, or other material having a straight edge and usually marked off in inches or centimeters, used for drawing lines, measuring, etc.

a person or thing that rules paper, wood, etc.

Astrology . the planet primarily associated with any sign of the zodiac or any house of the horoscope

The ruler of Aries is Mars. The ruler of Taurus is Venus.

noun

commoner , subject

noun

baron , baroness , caesar , caliph , contessa , count , countess , crowned head , czar , czarina , dame , duchess , duke , dynast , emperor , empress , gerent , imperator , kaiser , khan , king , lady , lord , magnate , maharajah , maharani , majesty , mikado , mogul , monarch , oligarch , overlord , pasha , potentate , prince , princess , queen , rajah , rani , rex , royal , shah , sovereign , sultan , sultana , tycoon , folding rule , measure , measuring stick , rule , slide rule , straightedge , t-square , yardstick , amir , arbiter , autocrat , bey , boss , burgrave , chief , commander , despot , dey , dictator , doge , dominator , emir , governor , interregent , khedive , leader , liege lord , matriarch , pharaoh , president , procurator , protector , regent , satrap , sheik , tetrarch , tsar , tyrant , vicegerent , viceroy