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

Definition of "copper" - American English Dictionary

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coppernoun [U]

 us   /ˈkɑp·ər/

copper noun [U] (METAL)

a ​soft, red-brown ​metal, used ​mostly in ​electricalequipment and for making ​wire and ​coins

copperadjective, 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)

Definition of "copper" - British English Dictionary

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coppernoun

uk   /ˈkɒp.ər/  us   /ˈkɑː.pɚ/

copper noun (METAL)

B2 [U] (symbol Cu) a ​chemicalelement 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 ​hairshone in the ​sunlight. [C usually plural] UK informal a ​browncoin of ​lowvalue: 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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