Marker

·noun One who or that which marks.

II. Marker ·noun A counter used in card playing and other games.

III. Marker ·noun One who keeps account of a game played, as of billiards.

IV. Marker ·noun An attachment to a sewing machine for marking a line on the fabric by creasing it.

V. Marker ·noun The soldier who forms the pilot of a wheeling column, or marks the direction of an Alignment.