noun

1. royal power, authority, or rule; sovereignty
2. dominance, prevalence, or sway the reign of good will
3. the period of rule, dominance, sway, etc.

Etymology: ME regne < OFr < L regnum < regere, to rule: see right

intransitive verb

1. 1. to rule as a sovereign
   2. to hold the title of sovereign, as in a constitutional monarchy
2. to hold sway; prevail or predominate when peace reigns

Etymology: ME regnen < OFr regner < L regnare, to rule < regnum