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English definition of “marker”

marker

noun [C] uk   /ˈmɑː.kər/ us    /ˈmɑːr.kɚ/

marker noun [C] (SYMBOL)

a sign that shows where something is: I've put in some markers where I planted the seeds. She reached the 500-metre marker in record time.Signs, signals and symbolsSpecific signs and symbols

marker noun [C] (PEN)

(also marker pen) a pen with a thick writing point for writing or drawingWriting implements
(Definition of marker from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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