copper

a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor

a copper penny

uncomplimentary terms for a policeman

a reddish-brown color resembling the color of polished copper

any of various small butterflies of the family Lycaenidae having coppery wings

A common metal of a reddish color, both ductile and malleable, and very tenacious. It is one of the best conductors of heat and electricity. Symbol Cu. Atomic weight 63.3. It is one of the most useful metals in itself, and also in its alloys, brass and bronze.

coat with a layer of copper

To cover or coat with copper; to sheathe with sheets of copper; as, to copper a ship.