premier meaning, definition, what is premier: best or most important. Learn more. "premiere" in English · Premiership · Definition of “premier” · The Premier League. A premiere is the first public performance of something. If you're looking for an adjective meaning "the very best," then use premier without the "e" at the end. Premier definition, the head of the cabinet in France or Italy or certain other countries; first minister; prime minister. See more.