premier

/prɪˈmɪr/
adjective
  1. Best or most important; top in rank or quality.
    • The university is known for its premier engineering program.
    • This restaurant is the premier dining spot in the city.
    • She is a premier expert in the field of marine biology.
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noun
  1. The head of a government, especially in a country or region; a prime minister or first minister.
    • The premier addressed the nation about the new healthcare plan.
    • The premier of the state announced a new education initiative.
    • Canada's premiers meet annually to discuss provincial issues.