Touchdown

n. landing; goal in American Football

For the song by T.I. featuring Eminem, see Touchdown (song). A touchdown is the primary method of scoring in American and Canadian football. To score a touchdown, one team must take the football into the opposite end zone. This can be done by rushing, in which the ball carrier carries the football forward into the end zone. It can also be done by passing, where an eligible receiver catches a forward pass in the end zone. The receiver can also catch the ball prior to reaching the end zone and carry it across the plane of the end zone. This would still be considered a "passing" touchdown as opposed to a "rushing" touchdown.
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Noun
1. a score in American football; being in possession of the ball across the opponents' goal line
(hypernym) score
(classification) American football, American football game
2. a landing (as the wheels touch the landing field); especially of airplanes
(hypernym) landing
(derivation) touch down

(n.)
The act of touching the football down behind the opponents' goal .
  

The contact, or moment of contact, of an aircraft or spacecraft with the landing surface. 1/1/73