(1):

(n.) One who keeps account of a game played, as of billiards.

(2):

(n.) One who or that which marks.

(3):

(n.) A counter used in card playing and other games.

(4):

(n.) An attachment to a sewing machine for marking a line on the fabric by creasing it.

(5):

(n.) The soldier who forms the pilot of a wheeling column, or marks the direction of an alignment.