monarch

1 one who rules over a people with a sole, supreme, and usually hereditary authority <the ruling monarch of Britain at that time was Queen Elizabeth I> Synonyms autocrat, potentate, ruler, sovereign (also sovran) Related Words coruler; Caesar, czar (also tsar or tzar), emir (or amir also ameer), emperor, empress, kaiser, khan, khedive, king, lord, mikado, mogul, prince, queen, satrap, shah, sultan, suzerain; authoritarian, Big Brother, despot, dictator, führer (or fuehrer), monocrat, overlord, paramount, tyrant

2 a person of rank, power, or influence in a particular field <the glitzy gala was attended by most of the reigning monarchs of the recording industry> Synonyms baron, captain, czar (also tsar or tzar), king, lion, lord, mogul, magnate, Napoleon, prince, tycoonRelated Words big boy, big cheese, bigfoot, biggie, big gun, big shot, big wheel, bigwig, fat cat, figure, heavy, heavyweight, honcho, kahuna, main man, mover and shaker, nabob, nawab, notable, personage, pooh-bah (also poo-bah), supremo [chiefly British], VIP; celebrity, personality, star, superstar; deity, demigod, godNear Antonyms half-pint, lightweight, small-timer; inferior, subordinate, underling; nobody, nothing, zero