hash mark

hash mark

n.1. A service stripe on the sleeve of an enlisted person's uniform.2. Football A mark in either of two series placed on the field perpendicular to the yard lines and used for spotting the ball.3. The symbol (#), especially when used as the start of a hashtag.

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[Alteration of hatch.]

hash′ mark`

n. 1. Informal. a service stripe. 2. (on a football field) the marking formed by either inbounds line intersecting with one of the lines delineating yardage between the goal lines. [1905–10]

Thesaurus

Noun

1.

hash mark - an insignia worn to indicate years of servicehashmark, service stripeinsignia - a badge worn to show official position