Marker

Marker may refer to:
 * Marker (linguistics), a morpheme that indicates some grammatical function
 * Marker (telecommunications), a special-purpose computer
 * A set of sewing patterns tightly arranged within a rectangle that is placed over cloth to be cut
 * Marker (Biology), or biological marker or biomarker, a substance used as an indicator of a biological state
 * Genetic marker, a DNA sequence with a known location on a chromosome and associated with a particular gene or trait.
 * Slang term, denoting a favor or obligation to be called upon.

Other uses

 * Historical marker, a plaque erected at historically significant locations
 * Marker pen, a felt-tipped pen used for drawing and/or coloring
 * Paintball marker or paintball gun, an air gun
 * Surface marker buoy, to mark a diver's position while underwater
 * Marker beacon, a beacon used in aviation
 * Casino marker, line of credit extended by a casino or cardroom
 * Watch marker, up to twelve of which delineate the hours around a dial
 * Clapperboard, equipment used during filming
 * Taggant, a chemical or physical marker added to materials
 * MARKER®, a registered name for investment products in Benelux

Names

 * Chris Marker (born 1921), French film maker and director of La jetée
 * Russell Earl Marker (1902-1995), American chemist

Culture

 * Marker (2005 film), a television film starring Link Baker and Sonja Bennett
 * Marker (2008 film), an action movie with Steven Seagal
 * Marker (novel), a thriller novel by Robin Cook
 * Marker (TV series), a 1995 American drama on UPN

Companies

 * Marker (alpine bindings), a company specializing in bindings

Places

 * Marker, Norway