Noun

(en noun)

A stone milepost (or by extension in other materials), one of a series of numbered markers placed along a road at regular intervals, typically at the side of the road or in a median.

An important event in a person's life or career, in the history of a nation, in the life of some project, etc.

* {{quote-magazine, year=2012, month=March-April

, author= , title=Well-connected Brains , volume=100, issue=2, page=171 , magazine=(American Scientist) citation , passage=Creating a complete map of the human connectome would therefore be a monumental milestone but not the end of the journey to understanding how our brains work.}}

Noun

(en noun)

An object used to mark a location.

Someone or something that marks.

# One who keeps account of a game played, as of billiards.

# A counter used in card games and other games.

# The soldier who forms the pilot of a wheeling column, or marks the direction of an alignment.

# An attachment to a sewing machine for marking a line on the fabric by creasing it.

* 2013 , Phil McNulty, " Man City 4-1 Man Utd", BBC Sport , 22 September 2013:

Pellegrini insisted this was a game City had to win - this they did and with the sort of performance that put down a marker for how the Chilean wants his team to play.

A felt-tipped pen.

(slang) A signed note of a debt to be paid.

(slang, figuratively) A nonmonetary debt owed to someone, especially in return for a favor.

We may not be able to do this alone. Maybe it’s time to call in some of our markers .

(paintball) A device that fires a paintball

(sports) A defending player who stays close to an opponent in order to mark them.

* {{quote-news

, year=2012 , date=April 21 , author=Jonathan Jurejko , title=Newcastle 3-0 Stoke , work=BBC Sport citation , page= , passage=He skipped past Marc Wilson before clipping a delicious cross into the Stoke danger zone, where Cisse's sharp movement allowed him to escape marker Robert Huth and send a far-post header crashing against the crossbar. And Cabaye was waiting to pounce on the rebound with a close range header.}}

A gene or DNA sequence with a known location on a chromosome that can be used to identify individuals or species.

(In competition law) A recognition given by a competition authority that a company is the first to approach it to reveal the existence of a cartel, as a prelude to a formal application for leniency for the company.