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
This includes the following highways: Interstate 35 in Missouri between mile markers 15 and 68.
—
Kansas City Star Weather Bot, Kansas City Star, 24 June 2025
The program enforcement will include a truck and cameras in an I-65 construction zone between mile markers 235 and 239, said INDOT spokeswoman Cassandra Bajek.
—Maya Wilkins, Chicago Tribune, 23 June 2025
In 2005, the Court held that displays in Kentucky courthouses violated the Constitution, while simultaneously upholding a Ten Commandments marker on the grounds of the Texas state Capitol in Austin.
—Adeola Adeosun, MSNBC Newsweek, 21 June 2025
On this occasion, Tel is positioned on the shoulder of the central defender and spun his marker in time with Bayern defender Bouna Sarr to split the Preussen Munster defence with a line-breaking pass, putting the forward on goal.
—Elias Burke, New York Times, 20 June 2025
See All Example Sentences for marker
Examples are automatically compiled from online sources to
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Kansas City Star Weather Bot, Kansas City Star, 24 June 2025
The program enforcement will include a truck and cameras in an I-65 construction zone between mile markers 235 and 239, said INDOT spokeswoman Cassandra Bajek.
—Maya Wilkins, Chicago Tribune, 23 June 2025
In 2005, the Court held that displays in Kentucky courthouses violated the Constitution, while simultaneously upholding a Ten Commandments marker on the grounds of the Texas state Capitol in Austin.
—Adeola Adeosun, MSNBC Newsweek, 21 June 2025
On this occasion, Tel is positioned on the shoulder of the central defender and spun his marker in time with Bayern defender Bouna Sarr to split the Preussen Munster defence with a line-breaking pass, putting the forward on goal.
—Elias Burke, New York Times, 20 June 2025
See All Example Sentences for marker
Cite this Entry
“Marker.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/marker. Accessed 29 Jun. 2025.
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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