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Definition of marker
marker
/ˈmɑːr.kɚ/
mar · ker
Plural:markers
marker Lexical Profile
CEFR
A2
Grade
2
Tier
1
Usage
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Wordle Guess
• noun
1
A felt-tip pen with a broad tip used for writing, drawing, or coloring.
Example
"The teacher used a red marker to write the instructions on the whiteboard."
2
An object used to indicate a specific position, place, or route.
Example
"We left a pile of stones as a marker so we could find our way back to the trail."
3
A measurable biological, genetic, or physical trait used to identify a specific disease, state, or evolutionary lineage.
Example
"The blood test screens for specific chemical markers associated with heart disease."
Synonyms
View all synonyms for marker• Rhymes for marker
Word Origin & Etymology
Derived from the verb 'mark' combined with the agent noun suffix '-er', originating from Old English 'mearcian' (to trace out boundaries).
Cite this Entry
Wordmom. (2026). Definition of Marker. In Wordmom Dictionary. Retrieved Oct 12, 2026, from https://wordmom.com/dictionary/marker