reign
1. reign \'ra-n\ n [ME regne, fr. OF, fr. L regnum, fr. reg-, rex king -] more at ROYAL 1a: royal authority : SOVEREIGNTY 1b: the dominion, sway, or influence of one resembling a monarch 2: the period of reign of a sovereign 2. reign vi 1a: to possess or exercise sovereign power : RULE 1b: to hold office as chief of state although exercising minimal powers of making and executing governmental policy 2: to exercise authority or hold sway in the manner of a monarch 3: to be predominant or prevalent
Webster's English Dictionary