Touchdown

from WordNet (r) 3.0 (2006)

touchdown
    n 1: a score in American football; being in possession of the
         ball across the opponents' goal line
    2: a landing (as the wheels touch the landing field); especially
       of airplanes

from The Collaborative International Dictionary of English v.0.48

Touchdown \Touch"down`\ (t[u^]ch"doun`), n. (Football)
   The act of touching the football down behind the opponents'
   goal; also the score (6 points) resulting from such a play.
   [1913 Webster]

   {Safety touchdown}. See under {Safety}.
      [1913 Webster]