marker

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noun mark·er \ˈmär-kər\

Definition of marker

  1. 1 :  one that marks

  2. 2 :  something used for marking

  3. 3 :  score 7; specifically :  run

  4. 4 :  promissory note, iou

  5. 5 :  something that serves to identify, predict, or characterize: such asa :  biomarkerb :  genetic marker

Examples of marker in a Sentence

  1. A person's accent can be a marker of social class.

  2. the markers on the rock and mineral specimens were old and faded

Recent Examples of marker from the Web

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.

First Known Use of marker

15th century


MARKER Defined for English Language Learners

marker

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noun

Definition of marker for English Language Learners

  • : 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


Medical Dictionary

marker

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noun mark·er \ˈmär-kər\

Medical Definition of marker

  1. :  something that serves to identify, predict, or characterize a surface marker on a cell that acts as an antigen: asa:  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 1991b:  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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