copper - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “copper”

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copper

noun [U]  us   /ˈkɑp·ər/

copper noun [U] (METAL)

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

copper

adjective, noun [U]  us   /ˈkɑp·ər/

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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