dethronement

/diˈθroʊnmənt/
noun
  1. The act or process of removing a ruler from power.
    • The dethronement of the king led to a period of instability.
    • Historians studied the causes of the emperor's dethronement.
    • The dethronement was carried out without bloodshed.
  2. The act of removing someone or something from a top position or dominant status.
    • The company's dethronement as market leader was swift.
    • The champion's dethronement surprised the sports world.
    • The dethronement of the old record holder made headlines.
Antonyms
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