Meaning of COPPER in English
/ ˈkɒpə(r); NAmE ˈkɑːp-/ noun
[ U ] ( symb Cu ) a chemical element. Copper is a soft reddish-brown metal used for making electric wires, pipes and coins :
a copper mine
coppers [ pl. ] ( BrE ) brown coins that do not have much value :
I only paid a few coppers for it.
[ C ] ( BrE , informal ) a police officer
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 .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005