| Ruler 1. (n.) One who rules; one who exercises sway or authority; a governor. 2. (n.) A straight or curved strip of wood, metal, etc., with a smooth edge, used for guiding a pen or pencil in drawing lines. Cf. Rule, n., 7 (a). Thesaurus Entries A per se, T square, ace, anointed king, birch, boss, cane, captain, castellan, champion, chatelain, chatelaine, chief, chieftain, club, commandant, commander, crowned head, dean, director, dynast, emperor, executive, ferule, fugleman, genius, governor, grand duke, head, high chief, higher-up, imperator, intendant, king, king-emperor, kinglet, laureate, leader, lord paramount, majesty, manager, master, monarch, nonpareil, overlord, paddle, pandybat, paragon, paramount, petty king, potentate, prince, prince consort, principal, prodigy, rattan, rod, royal, royal personage, royalty, rule, senior, sovereign, square, star, stick, straightedge, superior, superman, superstar, suzerain, switch, tetrarch, the greatest, the most, top dog, triangle, virtuoso |