An implement, especially a felt-tipped pen, used for marking or writing.
One who marks objects, especially for industrial purposes.
One who grades student papers.
Sports
a. A device, such as a line, stake, or flag, set on a playing field and showing the playing or scoring position.
b. A player who guards an opponent, as in soccer.
c. An official in certain court games, such as squash, who mainly judges whether the ball is out of play and whether a fault or let has occurred.
Games
a. One that keeps score in various games.
b. A score in a game.
Slang A written, signed promissory note.
A genetic marker.
Medicine A physiological substance, such as human chorionic gonadotropin or alpha-fetoprotein, that when present in abnormal amounts in the serum may indicate the presence of disease, as that caused by a malignancy. Also called biomarker.
Linguistics An element that indicates grammatical class or function; a derivational or inflectional morpheme.