What is the meaning of runner?

noun

• Someone who imports or exports without paying duties.
  • synonyms: smuggler, contrabandist, moon curser, moon-curser
• Someone who travels on foot by running.
• A person who is employed to deliver messages or documents.
  • usage: "he sent a runner over with the contract"
• A baseball player on the team at bat who is on base (or attempting to reach a base.
  • synonyms: base runner
• A horizontal branch from the base of plant that produces new plants from buds at its tips.
  • synonyms: stolon, offset
• A trained athlete who competes in foot races.
• Football) the player who is carrying (and trying to advance) the ball on an offensive play.
  • synonyms: ball carrier
• A long narrow carpet.
• Device consisting of the parts on which something can slide along.
• Fish of western Atlantic: Cape Cod to Brazil.
  • synonyms: blue runner, Caranx crysos