runner in WordNet English dictionary

1. (football) the player who is carrying (and trying to advance) the ball on an offensive play
   ball carrier  runner 
   
2. a baseball player on the team at bat who is on base (or attempting to reach a base)
   base runner  runner 
   
3. fish of western Atlantic: Cape Cod to Brazil
   runner  blue runner  Caranx crysos 
   
4. someone who imports or exports without paying duties
   smuggler  runner  contrabandist  moon curser  moon-curser 
   
5. a horizontal branch from the base of plant that produces new plants from buds at its tips
   stolon  runner  offset 
   
6. device consisting of the parts on which something can slide along
   runner 
   
7. a long narrow carpet
   runner 
   
8. a trained athlete who competes in foot races
   runner 
   
9. someone who travels on foot by running
   runner 
   
10. a person who is employed to deliver messages or documents
    "he sent a runner over with the contract"
    runner