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English definition of “copper”

copper

noun [U]  /ˈkɑp·ər/ us  

copper noun [U] (METAL)

a soft, red-brown metal, used mostly in electrical equipment and for making wire and coins

copper

adjective, noun [U]  /ˈkɑp·ər/ us  

copper adjective, noun [U] (COLOR)

(of) a bright red-brown color
(Definition of copper from the Cambridge Academic Content Dictionary © Cambridge University Press)
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