inaugural in WordNet English dictionary

1. serving to set in motion
   "the magazine's inaugural issue"; "the initiative phase in the negotiations"; "an initiatory step toward a treaty"; "his first (or maiden) speech in Congress"; "the liner's maiden voyage"
   inaugural  initiative  initiatory  first  maiden 
   
2. occurring at or characteristic of a formal investiture or induction
   "the President's inaugural address"; "an inaugural ball"
   inaugural 
   

1. the ceremonial induction into a position
   "the new president obviously enjoyed his inauguration"
   inauguration  inaugural 
   
2. an address delivered at an inaugural ceremony (especially by a United States president)
   inaugural address  inaugural