Number

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

In team sports, the number, often referred to as the uniform number, squad number, jersey number, shirt number, sweater number, or similar (with such naming differences varying by sport and region) is the number worn on a player's uniform, to identify and distinguish each player (and sometimes others, such as coaches and officials) from others wearing the same or similar uniforms.

Excerpt from the Wikipedia article “Number (sports)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: billtnj, CC BY-SA 2.0, via Wikimedia Commons.