Definition of copper noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈkɒpə(r)//
    ; NAmE NAmE//ˈkɑːpər//
    The police, Materials and properties
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  1. 1 [uncountable] (symbol Cu) a chemical element. Copper is a soft reddish-brown metal used for making electric wires, pipes and coins a copper mine copper pipes copper-coloured hair See related entries: Materials and properties
  2. 2coppers [plural] (British English) brown coins that do not have much value I only paid a few coppers for it.
  3. 3[countable] (British English, informal) a police officer See related entries: The police
  4. Word Origin senses 1 to 2 Old English copor, coper (related to Dutch koper and German Kupfer), based on late Latin cuprum, from Latin cyprium aes ‘Cyprus metal’ (so named because Cyprus was the chief source). sense 3 mid 19th cent.: from cop + -er.Extra examples Her hair shone like burnished copper. She works mainly in copper. copper alloyed with arsenic Apparently, her dad’s a copper. There are a couple of coppers waiting outside.
See the Oxford Advanced American Dictionary entry: copper