Meaning

verb have sovereign power

noun a period during which something or somebody is dominant or powerful

verb be larger in number, quantity, power, status or importance

originFrom Middle English regnen, from Old French reignier, from the Latin verb rēgnō, and the noun rēgnum. Doublet of regnum. Displaced native Old English rīċe (“a reign”) and ricsian (“to reign”).

Etymology from Wiktionary, CC BY-SA 3.0