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English definition of “marker”

marker

noun [C] (PEN)    /ˈmɑː.kər/ US  /ˈmɑːr.kɚ/ (also marker pen)
a pen with a thick writing point for writing or drawingWriting implements
(Definition of marker noun (PEN) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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