/run"bak'/ , n.
1. Football.
a. a run made by a player toward the goal line of the opponents after receiving a kick, intercepting a pass, or recovering an opponent's fumble.
b. the distance covered in making such a run.
2. Tennis. the space on a tennis court between the base line and the backstop.
[ 1905-10; n. use of v. phrase run back ]