copper definition, meaning - what is copper in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “copper”

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copper

noun uk   /ˈkɒp.ər/  us   /ˈkɑː.pɚ/

copper noun (METAL)

B2 [U] (symbol Cu) a chemical element that is a reddish-brown metal, used especially for making wire and coins: copper wire/pipes a copper alloy [U] the reddish-brown colour of the metal copper: The copper of Rosie's hair shone in the sunlight. [C usually plural] UK informal a brown coin of low value: I gave him a few coppers.
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copper noun (POLICE)

[C] UK informal a police officer
copper
adjective uk   us  
of the reddish-brown colour of the metal copper
(Definition of copper from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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