marker (n.)

  1. some conspicuous object used to distinguish or mark something; the buoys were markers for the channel'

  2. a distinguishing symbol; the owners mark was on all the sheep

    [ Syn: marking , mark ]

  3. a writing implement for making a mark

The dictionary is based on the WordNet Electronic Lexical Database.
WordNet 3.0 Copyright 2011 by Princeton University. All rights reserved.