Definition:
marker
- markerA promissory note; an IOU
- marker(chiefly in soccer) A player who is assigned to mark a particular opponent
- markerA person who records the score in a game, esp. in snooker or billiards
- markerA radio beacon used to guide the pilot of an aircraft
- markerone that marks (to impress or stamp with a sign)
- markerAn object used to indicate a position, place, or route
- markerA thing serving as a standard of comparison or as an indication of what may be expected
- markerA felt-tip pen with a broad tip