Hash-mark definition

A service stripe on the sleeve of an enlisted person's uniform.
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(football) A mark in either of two series placed on the field perpendicular to the yard lines and used for spotting the ball.
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(football) Any of the segments of the inbounds line marked on the field at the yard lines: they mark the point at which the ball is put back in play after it has been grounded outside an inbounds line.
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Other Word Forms

Noun

Singular:
hash-mark
Plural:
hash marks

Origin of hash-mark

  • Alteration of hatch

    From American Heritage Dictionary of the English Language, 5th Edition