hegemon

/ˈhɛdʒəˌmɑn/
noun
  1. A country, group, or person that has dominant power or influence over others.
    • Historically, Rome was the hegemon of the Mediterranean region.
    • The United States was seen as a global hegemon after the Cold War.
    • The company became the market hegemon by buying out its competitors.
Antonyms
What does "hegemon" mean? | whatsthatwordmean | whatsthatwordmean