marker

1. A felt-tipped pen, a marker pen. (countable, uncountable) · Don't use the permanent marker on the whiteboard.
2. A scorekeeper, especially one who tallies billiard scores. (countable, uncountable)
3. A device that fires a paintball. (countable, uncountable)
4. Someone or something used to mark a position or amount, particularly (countable, uncountable)
5. A real or virtual objective, something to be aimed for. (countable, uncountable)
6. A location on a stage or set where an actor is to stand or move to during a scene, usually indicated by a small X design placed on the floor. (countable, uncountable)
7. A direction issued by a camera operator for actors to be on their locations in readiness for a take. (countable, uncountable)
8. Synonym of IOU, an informal record of a debt. (US, countable, slang, uncountable)

الجمع markers