Definition of “copper” - English Dictionary

“copper” in British English

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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.

More examples

  • The downward drift in copper prices looks set to continue.
  • Brass is an alloy of copper and zinc.
  • Chemical analysis revealed a high content of copper.
  • They mine a lot of copper around these parts.
  • One of the properties of copper is that it conducts heat and electricity very well.
adjective uk us

of the reddish-brown colour of the metal copper

(Definition of “copper” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“copper” in American English

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coppernoun [ U ]

us /ˈkɑp·ər/

copper noun [ U ] (METAL)

a soft, red-brown metal, used mostly in electrical equipment 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)