What is the meaning of reign?

noun

• A period during which something or somebody is dominant or powerful.
  • usage: "he was helpless under the reign of his egotism"
• The period during which a monarch is sovereign.
  • usage: "during the reign of Henry VIII"
• Royal authority; the dominion of a monarch.
  • synonyms: sovereignty

verb

• Have sovereign power.
  • usage: "Henry VIII reigned for a long time"
• Be larger in number, quantity, power, status or importance.
  • usage: "Money reigns supreme here"; "Hispanics predominate in this neighborhood"
  • synonyms: predominate, dominate, rule, prevail