monarch

noun
  1. A sovereign head of state, especially a king, queen, or emperor, who holds a hereditary position and typically rules for life. noun
    The monarch presided over the kingdom with a fair and just hand.
    Queen Elizabeth II was a beloved monarch who reigned for over 70 years.
  2. A person or thing that holds a dominant position or power in a particular sphere. noun
    In the world of fashion, she was considered the monarch of style.
    The company became the monarch of the tech industry with its innovative products.
  3. A large migratory butterfly with orange and black wings, known scientifically as Danaus plexippus, found mainly in North America. noun
    The monarch butterfly is famous for its long migration from North America to central Mexico.
    Conservation efforts are underway to protect the monarch butterfly's natural habitats.