Reign means the period of time when a monarch rules or has influence, or the exercise of sovereign power. Learn how to use reign correctly, avoid common confusions with rain and rein, and find synonyms and examples. The meaning of REIGN is royal authority : sovereignty. How to use reign in a sentence. Reign : A Comprehensive Overview Last Update: 2025-03-08 10:54:37 Meaning and Definitions The word " reign " carries a significant weight, typically referring to the period of time a sovereign (such as a king, queen, emperor, or empress) rules a country or territory. At its core, it denotes the act of governing or ruling with authority and power. Beyond this central definition , " reign " can also be used figuratively to describe a situation where a particular principle, quality, or influence is ... reign meaning , definition , what is reign : the period when someone is king, queen, ...: Learn more.