What is "rush line"

Rush \Rush\, n.

1. A moving forward with rapidity and force or eagerness; a violent motion or course; as, a rush of troops; a rush of winds; a rush of water.

   A gentleman of his train spurred up his horse, and, with a violent rush, severed him from the duke.
   --Sir H. Wotton.

2. Great activity with pressure; as, a rush of business.

3. A perfect recitation. [College Cant, U.S.]

4. (Football) (a) A rusher; as, the center rush, whose place is in the center of the rush line; the end rush.

   Bunt rush (Football), a combined rush by main strength.

   Rush line (Football), the line composed of rushers.