marker

An object used to mark a location.

Someone or something that marks.

A real or virtual objective, something to be aimed for.

A felt-tipped pen.

“Susie used a marker to write her name on the wall.”

Marks of ink left by this type of pen.

“Susie has gotten marker all over the walls, and it looks dreadful.”

A signed note of a debt to be paid.

A nonmonetary debt owed to someone, especially in return for a favor.

“We may not be able to do this alone. Maybe it’s time to call in some of our markers.”

A device that fires a paintball.

A defending player who stays close to an opponent in order to mark them.

A player employed by a private club and available to compete against members.

A gene or DNA sequence with a known location on a chromosome that can be used to identify individuals or species.

A recognition given by a competition authority that a company is the first to approach it to reveal the existence of a cartel, as a prelude to a formal application for leniency for the company.

To mark or write on (something) using a marker