mark·​er | \ˈmär-kər \

Definition of marker 

1 : one that marks

2 : something used for marking: such as

a : a type of felt tip pen that makes wide lines drew a tree with green and brown markers used a permanent marker to label the boxes

b : any of various sewing devices for making or indicating guidelines a pin marker for hemlines

3 : score sense 7 specifically : run

5 : something that serves to identify, predict, or characterize: such as

a : biomarker

b : genetic marker

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Examples of marker in a Sentence

A person's accent can be a marker of social class. the markers on the rock and mineral specimens were old and faded

Recent Examples on the Web

The event will take place at 12th Street Memorial and Pavilion, a project that features a public gathering space outside of the recreation center and a steel memorial marker that bears the names of the people known to have died during the unrest. Detroit Free Press, "For the 51st anniversary of rebellion, a free screening of '12th and Clairmount'," 13 July 2018 Collisions with jet bridges, which connect aircraft to the airport terminal, were a common source of damage, so the airline began putting markers on planes to help jet bridge operators avoid hitting them. Lauren Zumbach,, "From birthday wishes for passengers to tracking baggage handler injuries, airlines tap big data to try to improve operations," 12 July 2018 California law requires that emissions return to 1990 levels by 2020 and reach 40 percent below that marker by 2030. Christopher Weber,, "California meets greenhouse gas reduction goal years early," 12 July 2018 To add grotesque insult to injury, this 15-year-old child Gilead killed will have no grave marker, while her body will be used as animal feed. Emma Dibdin, Harper's BAZAAR, "The Handmaid's Tale Season 2 Finale Offers a Light in the Darkness," 11 July 2018 Twellman bought a pack of 24 Crayola crayons and another set of 10 Crayola markers. Jacob Feldman,, "How ESPN Is Covering the World Cup Without Highlights," 10 July 2018 The Blombergs had told me the area is especially popular for snowshoeing in the winter, and snowshoe signs on trail markers were evidence of that. Chelsey Lewis, Milwaukee Journal Sentinel, "Wisconsin's highest point - Timm's Hill - is a quiet escape away from everything," 5 July 2018 Vince Zamora placed an evidence marker on the floor of a bathroom in a retirement home. Becky Jacobs, Post-Tribune, "Virtual crime scene gives students hands-on training without the risk," 3 July 2018 So markers that have been associated with cancer incidence should be left out—that would be one solution. Matt Warren, Science | AAAS, "Crime scene DNA could be used to reveal a suspect’s age—and whether they have cancer," 3 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'marker.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of marker

15th century, in the meaning defined at sense 1

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Statistics for marker

Last Updated

11 Nov 2018

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The first known use of marker was in the 15th century

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More Definitions for marker



English Language Learners Definition of marker

: something (such as a sign or an object) that shows the location of something

: something that shows the presence or existence of something

: a type of pen that makes wide lines


mark·​er | \ˈmär-kər \

Medical Definition of marker 

: something that serves to identify, predict, or characterize a surface marker on a cell that acts as an antigen : as

a : biomarker The recent discovery of a serological marker for the hepatitis C virus has greatly improved diagnostic accuracy for this form of hepatitis. — Gary P. Wormser, letter in The Journal of the American Medical Association, 12 June 1991

b : genetic marker The idea in genetic linkage analysis is to see if any particular marker, which serves as a signpost for a specific region of a chromosome, is consistently inherited along with the disease …— Leslie Roberts, Science, 29 Jan. 1993

called also marker gene

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playful or foolish behavior

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