runner (Noun) — Someone who imports or exports without paying duties.
runner (Noun) — Someone who travels on foot by running.
runner (Noun) — A person who is employed to deliver messages or documents. ex. "he sent a runner over with the contract"
runner (Noun) — (baseball) a baseball player on the team at bat who is on base (or attempting to reach a base).
runner (Noun) — A horizontal branch from the base of plant that produces new plants from buds at its tips.
runner (Noun) — A trained athlete who competes in foot races.
runner (Noun) — (football) the player who is carrying (and trying to advance) the ball on an offensive play.
runner (Noun) — A long narrow carpet.
runner (Noun) — Device consisting of the parts on which something can slide along.
runner (Noun) — Fish of western Atlantic: Cape Cod to Brazil.
runner (Noun) — A canvas shoe with a pliable rubber sole.