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English definition of “copper”

copper

noun     /ˈkɒpər/
METAL [U] B2 a soft, red-brown metal, used in electrical equipment and to make coins, etc (symbol Cu): copper wireChemical elements
MONEY [C] UK a brown coin with a low valueBritish money
POLICE [C] UK informal a police officerPeople who work for the police service
(Definition of copper noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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