English to English

noun (n)

• (football) a kick from the center of the field to start a football game or to resume it after a score(noun.act)

  source: wordnet30
• the time at which something is supposed to begin(noun.time)

  Synonym:
  beginning, commencement, first, get-go, offset, outset, showtime, start, starting time
  Antonym:
  end, ending
  

  source: wordnet30
• a start given to contestants(noun.event)

  Example:
  I was there with my parents at the kickoff.
  

  Synonym:
  send-off, start-off
  

  source: wordnet30