goal line

Short definition from Wiktionary

Noun

1. 1
   the boundary of the field that runs along its width at each end, and across the front of the goal.
2. 2
   part of a vertical plane separating an end zone from the field of play when the ball is touched or is in player possession. The plane extends beyond the sidelines. A team’s goal line is that which it is defending.
3. 3
   the red line that runs across the rink and the front of the goal.

Adjective

1. 1
   goal line