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
4
5
: something that serves to identify, predict, or characterize: such as
a
b
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
But Latino voter dissatisfaction persisted despite better economic markers as the election progressed.
—
Suzanne Gamboa, NBC News, 6 Nov. 2024
In the second quarter of the game at Lincoln Financial Field, the 27-year-old received a pass from quarterback Jalen Hurts on a key third down, still needing to evade two defenders to reach the first down marker.
—Ben Morse, CNN, 4 Nov. 2024
The mice that participated in the experiment had high levels of epigenetic markers on genes that control the opening and closing of chromatin.
—William A. Haseltine, Forbes, 1 Nov. 2024
Wills, the executive director of the preservation society, originally had ambitions to secure just three historical markers.
—Karina Atkins, Chicago Tribune, 27 Oct. 2024
See all Example Sentences for marker 
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Suzanne Gamboa, NBC News, 6 Nov. 2024
In the second quarter of the game at Lincoln Financial Field, the 27-year-old received a pass from quarterback Jalen Hurts on a key third down, still needing to evade two defenders to reach the first down marker.
—Ben Morse, CNN, 4 Nov. 2024
The mice that participated in the experiment had high levels of epigenetic markers on genes that control the opening and closing of chromatin.
—William A. Haseltine, Forbes, 1 Nov. 2024
Wills, the executive director of the preservation society, originally had ambitions to secure just three historical markers.
—Karina Atkins, Chicago Tribune, 27 Oct. 2024
See all Example Sentences for marker
Dictionary Entries Near marker
Cite this Entry
“Marker.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/marker. Accessed 28 Nov. 2024.
Copy CitationKids Definition
marker
noun
mark·er
ˈmär-kər 
1
: one that marks
2
: something used for marking
Medical Definition
marker
noun
mark·er
ˈmär-kər
: 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
Gary P. Wormser, letter in The Journal of the American Medical Association
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
Leslie Roberts, Sciencecalled also marker gene
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