marker
noun
[ ˈmɑːkə ]
• an object used to indicate a position, place, or route.
• "they erected a granite marker at the crash site"
• a felt-tip pen with a broad tip.
• "a heavy line drawn by a marker"
• (in team games) a player who stays close to an opponent to prevent them from getting or passing the ball.
• "Quinn took the ball wide of his marker"
• a person who assesses the standard of a test or examination.
• "the aim of the marker is to help the student do better next time"
• a promissory note; an IOU.
• "we'll give you a marker, you give us the car"
