armband

American  

[ahrm-band] / ˈɑrmˌbænd /

noun

1. a fabric band worn around the upper arm as a badge or symbol; brassard.

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armband British  

/ ˈɑːmˌbænd /

noun

1. a band of material worn round the arm, such as one bearing an identifying mark, etc, or a black one indicating mourning

2. an inflatable buoyancy aid, worn on the upper arm of a person learning to swim

3. an elasticated band worn round the upper arm to keep the shirtsleeve in place

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Etymology

Origin of armband

First recorded in 1790–1800; arm ¹ + band ²