1. an object used to indicate a position, place, or route: "they erected a granite marker at the crash site"
▪ a thing serving as a standard of comparison or as an indication of what may be expected: "such studies may provide a unique marker in the quest to understand the brain"
▪ a radio beacon used to guide the pilot of an aircraft.
2. a felt-tip pen with a broad tip: "a heavy line drawn by a marker"
3. (chiefly in soccer) a player who is assigned to mark a particular opponent: British"Quinn took the ball wide of his marker"
▪ a person who records the score in a game, especially in snooker or billiards.
4. a promissory note; an IOU:informalNorth American"Phyllis owed a marker in the neighborhood of $100,000"
