[syn: kickoff, send-off, start-off]
The Collaborative International Dictionary of English v.0.48:
kickoff \kickoff\ n. (Football)
   1. A kick from the center of the field to start a football
      game or to resume it after a score.
      [WordNet 1.5]
   2. the time at which an event or activity begins.
   Syn: beginning, commencement, first, outset, start, starting
        time, offset.
        [WordNet 1.5]
WordNet (r) 3.0 (2006):
kickoff
    n 1: (football) a kick from the center of the field to start a
         football game or to resume it after a score
    2: the time at which something is supposed to begin; "they got
       an early start"; "she knew from the get-go that he was the
       man for her" [syn: beginning, commencement, first,
       outset, get-go, start, kickoff, starting time,
       showtime, offset] [ant: end, ending, middle]
    3: a start given to contestants; "I was there with my parents at
       the kickoff" [syn: kickoff, send-off, start-off]