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 Originsenses 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