a chemical element. Copper is a soft red-brown metal used for making electric wires, pipes and coins.
He wore a copper bracelet on his wrist.
One of the most important materials is copper, and it tells us about the situation for businesses.
brown coins that do not have much value
a copper coin, especially a penny.
I only paid a few coppers for it.
a police officer
Apparently, her dad's a copper.