A marker is an ink-filled pen with a wide tip. Kids often use washable markers, while adults are usually trusted with the permanent type.

Permanent markers contain ink that can't be washed away, and they're useful for labeling and marking things like cardboard boxes and file folders. Another kind of marker is a highlighter, which you can use to make important words or phrases in a book stand out with a line of translucent neon ink. A different meaning of marker is "something that marks a route or specific place." Markers along a hiking trail help keep you from getting lost.

Definitions of marker
  1. noun
    a writing implement for making a mark
    see moresee less
    a fluorescent marker used to mark important passages in a text
    type of:
    writing implement
    an implement that is used to write
  2. noun
    some conspicuous object used to distinguish or mark something
    “the buoys were markers for the channel”
    see moresee less
    bookmark, bookmarker
    a marker (a piece of paper or ribbon) placed between the pages of a book to mark the reader's place
    yard marker
    (football) a marker indicating the yard line
    type of:
    artefact, artifact
    a man-made object taken as a whole
  3. noun
    a distinguishing symbol
    synonyms: insignia, mark, marking
    see moresee less
    show 18 types...
    hide 18 types...
    identification mark on the ear of a domestic animal
    identification mark on skin, made by burning
    a formally registered symbol identifying the manufacturer or distributor of a product
    assay-mark, authentication, hallmark
    a mark on an article of trade to indicate its origin and authenticity
    a cancellation mark stamped on mail by postal officials; indicates the post office and date of mailing
    a distinguishing mark impressed on paper during manufacture; visible when paper is held up to the light
    broad arrow
    an arrowhead mark identifying British government property
    milepost, milestone
    stone post at side of a road to show distances
    peg, pin
    small markers inserted into a surface to mark scores or define locations etc.
    pip, spot
    a mark on a die or on a playing card (shape depending on the suit)
    an identifying or descriptive marker that is attached to an object
    a mound of stones piled up as a memorial or to mark a boundary or path
    a pen with indelible ink that will write on any surface
    logo, logotype
    a company emblem or device
    gummed label, paster, sticker
    an adhesive label
    tag, ticket
    a label written or printed on paper, cardboard, or plastic that is attached to something to indicate its owner, nature, price, etc.
    a label associated with something for the purpose of identification
    title bar
    (computer science) a horizontal label at the top of a window, bearing the name of the currently active document
    type of:
    an arbitrary sign (written or printed) that has acquired a conventional significance
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week