/ˈkɑːpər/
cop·per
BrE /ˈkɒpə(r)/
NAmE /ˈkɑːpər/
[U] (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
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