Webster's English Dictionary

Enter the word to look up:

touchdown

touch.down \'t*ch-.dau.n\ n 1: the act of touching a football to the ground 
   behind an opponent's goal;  specif : the act of scoring six points in 
   American football by being lawfully in possession of the ball on, above, or 
   behind an opponent's goal line when the ball is declared dead 2: the act or 
   moment of touching down with an airplane