B2 [ U ] symbol Cu a chemical element that is a reddish-brown metal, used especially for making wire and coins铜
[ U ] the reddish-brown colour of the metal copper红棕色,紫铜色
[ C usually plural ] UK informal a brown coin of low value铜板,铜币
More examples
The downward drift in copper prices looks set to continue.
Brass is an alloy of copper and zinc.
Chemical analysis revealed a high content of copper.
They mine a lot of copper around these parts.
One of the properties of copper is that it conducts heat and electricity very well.
[ C ] UK informal a police officer 警察
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