n. Royal authority; supreme power; sovereignty; rule; dominion.n. The territory or sphere which is reigned over; kingdom; empire; realm; dominion.n. The time during which a king, queen, or emperor possesses the supreme authority.verb-intransitive. To possess or exercise sovereign power or authority; to exercise government, as a king or emperor;; to hold supreme power; to rule.verb-intransitive. Hence, to be predominant; to prevail.verb-intransitive. To have superior or uncontrolled dominion; to rule.