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English definition of “grey”

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grey

adjective uk ( US usually gray)   /ɡreɪ/ us  

grey adjective (COLOUR)

A1 of the colour that is a mixture of black and white, the colour of rain clouds: a grey skyC2 having hair that has become grey or white, usually because of age: He started to go/turn grey in his mid-forties.B2 used to describe the weather when there are a lot of clouds and little light: Night turned into morning, grey and cold.

grey adjective (BORING)

C1 boring and sad: He saw a grey future stretch ahead of him.
greyness
noun [U] uk ( US usually grayness)   /ˈɡreɪ.nəs/ us  

grey

noun [C or U] uk ( US usually gray)   /ɡreɪ/ us  
A2 the colour that is a mixture of black and white, the colour of rain clouds: She was dressed in grey.
More examples

grey

verb [I] uk ( US usually gray)   /ɡreɪ/ us  

grey verb [I] (HAIR)

If a person or their hair greys, their hair becomes grey or white, usually because of age: I'm greying at the sides.

grey verb [I] (GET OLDER)

If a group of people is greying, it contains an increasing number of older people: Italy is greying faster than any other European country.
(Definition of grey from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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