'Touchdown' definitions:
Definition of 'touchdown'
(from WordNet)
noun
A score in American football; being in possession of the ball across the opponents' goal line
noun
A landing (as the wheels touch the landing field); especially of airplanes
Definition of 'Touchdown'
From: GCIDE
- 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]