Definitions of premier:

• noun:   the person who is head of state (in several countries)
• noun:   the person who holds the position of head of state in England
• verb:   perform a work for the first time
• verb:   be performed for the first time

  Example: "We premiered the opera of the young composer and it was a critical success"

• adjective:   preceding all others in time

  Example: "The premiere showing"