mark‧er /ˈmɑːkə $ ˈmɑːrkər/ noun [countable]

1. an object, sign etc that shows the position of something:
He buried the bodies in a single grave with a wooden cross as a marker.

2. something which shows that a quality or feature exists or is present Synonym : mark
marker of/for
antibodies which are a marker of hepatitis
the use of slang as a marker of social identity

3. (also marker pen British English) a large pen with a thick point made of felt, used for marking or drawing things ⇒ Magic Marker

4. put/lay/set down a marker British English to say or do something that clearly shows what you will do in the future

[TahlilGaran] Dictionary of Contemporary English ▲