reign -- (a period during which something or somebody is dominant or powerful; "he was helpless under the reign of his egotism")
reign -- (the period during which a monarch is sovereign; "during the reign of Henry VIII")
reign, sovereignty -- (royal authority; the dominion of a monarch)
Overview of verb reign
The verb reign has 2 senses
reign -- (have sovereign power; "Henry VIII reigned for a long time")
predominate, dominate, rule, reign, prevail -- (be larger in number, quantity, power, status or importance; "Money reigns supreme here"; "Hispanics predominate in this neighborhood")