red Definition in the Cambridge English Dictionary
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Definition of “red” - English Dictionary

Definition of "red" - American English Dictionary

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redadjective, noun [C/U]

 us   /red/ (-dd-)
(of) the ​color of ​freshblood: red ​gloves [U] She ​wore red. [C] These reds don’t ​match. physics Red is also the ​color of ​light with the ​longest waves that humans can ​see.
Idioms

Rednoun [C]

 /red/
world history a communist (= a ​person who ​believes in ​sharedownership of ​property and ​control of the ​methods of ​production)
(Definition of red from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "red" - British English Dictionary

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redadjective

uk   us   /red/ (redder, reddest)
A1 of the ​colour of ​freshblood: red ​lipstick The ​dress was ​bright red.A2 used to ​describehair that is an orange-brown ​colourgo/turn (bright) red B2 If you go/​turn red, ​yourfacebecomes red because you are ​angry or ​embarrassed: Look, you've ​embarrassed him - he's gone ​bright red! If ​youreyes are red, the ​whitepart of ​youreyes and the ​skin around ​youreyes is red, because of ​crying, ​tiredness, too much ​alcohol, etc.
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redness
noun [U] uk   us   /ˈred.nəs/
Her ​scarhealed, but the redness ​remained for a ​longtime.

rednoun [C or U]

uk   us   /red/
A2 the ​colour of ​freshblood: She uses a lot of reds and ​pinks in her ​paintings. I've always ​worn a lot of red. She was ​dressed all in red.
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Rednoun [C]

uk   us   /red/ mainly disapproving
(Definition of red from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "red" - Business English Dictionary

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rednoun

uk   us   /red/
in the red FINANCE a ​company or ​organization that is in the red has ​lostmoney in a particular ​period: Currently the ​group is in the red by $1.7 million. STOCK MARKET shares that are in the red have ​fallen in ​value: Almost all ​stocks on the FTSE 250 were in the red and the ​indexfinished 426.8 ​pointslower. BANKING a ​bankaccount that is in the red has an ​amount that is less than zero: Increasing ​numbers of ​people are ​finding their ​bankbalances in the red once they've ​paid their monthly ​bills.
into the red FINANCE, BANKING into a ​situation where you are ​losingmoney after making a ​profit: go/fall/slide into the red Many ​technologyfirms have ​fallendeep into the red after a ​collapse in ​revenues from the ​telecomsindustry. STOCK MARKET if a ​stockmarket goes into the red, it ​falls to a ​value that is below the one at which it ​started: go/fall/slide into the red Stock ​marketsslid into the red by late morning.
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(Definition of red from the Cambridge Business English Dictionary © Cambridge University Press)
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