NOUN (3)

1. (football) a ball carrier who tries to gain ground by running with the ball;

2. someone who migrates as part of a rush to a new gold field or a new territory;

3. a person who rushes; someone in a hurry; someone who acts precipitously;

The Collaborative International Dictionary of English v.0.48:

Rusher \Rush"er\, n.
   One who strewed rushes on the floor at dances. [Obs.] --B.
   Jonson.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rusher \Rush"er\, n.
   One who rushes. --Whitlock.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rusher
    n 1: (football) a ball carrier who tries to gain ground by
         running with the ball
    2: someone who migrates as part of a rush to a new gold field or
       a new territory
    3: a person who rushes; someone in a hurry; someone who acts
       precipitously