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English definition of “hair”

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hair

noun  /heər/ us  
the mass of thin structures on the head of a person, or any of these structures that grow out of the skin of a person or animal: [U] blond/curly/wavy hair [C] I already have a few gray hairs. [U] I have to get my hair cut this week.
(Definition of hair from the Cambridge Academic Content Dictionary © Cambridge University Press)
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