Ruler

• POS: Noun
• HYPHEN: rul=er

CIDE DICTIONARY

Ruler, n. 

•  One who rules; one who exercises sway or authority; a governor.  [1913 Webster]

  "And he made him ruler over all the land."  [1913 Webster]

  "A prince and ruler of the land."  [1913 Webster]
•  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)<-- usu. marked with graduations so that it can be used to measure distances -->.  [1913 Webster]

Parallel ruler. See under Parallel.

OXFORD DICTIONARY

Ruler, n.
1 a person exercising government or dominion.
2 a straight usu. graduated strip or cylinder of wood, metal, etc., used to draw lines or measure distance.

Derivative

rulership n.

THESAURUS

Ruler

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

ROGET THESAURUS

Ruler

Master

N master, padrone, lord, lord paramount, commander, commandant, captain, chief, chieftain, sirdar, sachem, sheik, head, senior, governor, ruler, dictator, leader, boss, cockarouse, sagamore, werowance, lord of the ascendant, cock of the walk, cock of the roost, gray mare, mistress, potentate, liege, liege lord, suzerain, sovereign, monarch, autocrat, despot, tyrant, oligarch, crowned head, emperor, king, anointed king, majesty, imperator, protector, president, stadholder, judge, ceasar, kaiser, czar, tsar, sultan, soldan, grand Turk, caliph, imaum, shah, padishah, sophi, mogul, great mogul, khan, lama, tycoon, mikado, tenno, inca, cazique, voivode, landamman, seyyid, Abuna, cacique, czarowitz, grand seignior, prince, duke, archduke, doge, elector, seignior, marland, margrave, rajah, emir, wali, sheik nizam, nawab, empress, queen, sultana, czarina, princess, infanta, duchess, margravine, czarevna, czarita, maharani, rani, rectrix, regent, viceroy, exarch, palatine, khedive, hospodar, beglerbeg, three-tailed bashaw, pasha, bashaw, bey, beg, dey, scherif, tetrarch, satrap, mandarin, subahdar, nabob, maharajah, burgrave, laird, collector, commissioner, deputy commissioner, woon, the authorities, the powers that be, the government, staff, etat major, aga, official, man in office, person in authority, sircar, sirkar, Sublime Porte, marshal, field marshal, marechal, general, generalissimo, commander in chief, seraskier, hetman, lieutenant general, major general, colonel, lieutenant colonel, major, captain, centurion, skipper, lieutenant, first lieutenant, second lieutenant, sublieutenant, officer, staff officer, aide-de-camp, brigadier, brigade major, adjutant, jemidar, ensign, cornet, cadet, subaltern, noncommissioned officer, warrant officer, sergeant, sergeant major, color sergeant, corporal, corporal major, lance corporal, acting corporal, drum major, captain general, dizdar, knight marshal, naik, pendragon, mayor, mayoralty, prefect, chancellor, archon, provost, magistrate, syndic, alcalde, alcaid, burgomaster, corregidor, seneschal, alderman, councilman, committeeman, councilwoman, warden, constable, portreeve, lord mayor, officer, dewan, fonctionnaire, admiral, admiralty, rear admiral, vice admiral, port admiral, commodore, captain, commander, lieutenant, ensign, skipper, mate, master, officer of the day, OD, navarch, da locum melioribus, der Furst ist der erste Diener seines Staats, the prince is the first servant of his state, lord of thy presence and no land beside.