a slip (as of paper or cloth) that is attached to something to identify or describe it <the markers on the rock and mineral specimens were old and faded> Related Words caption
something that sets apart an individual from others of the same kind <after many blind dates, he's come to realize that self-absorption is the infallible marker of a real loser> Synonyms affection
Related Words badge
Seen & Heard
What made you want to look up marker? Please tell us where you read or heard it (including the quote, if possible).