1. [ noun ] (chemistry) 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
Synonyms: atomic_number_29 Cu
Related terms: metallic_element conductor blister_copper brass bronze cuprite chalcopyrite malachite chalcocite bornite
2. [ noun ] (color) a reddish brown the color of polished copper
Synonyms: copper_color
Related terms: reddish_brown
3. [ noun ] a copper penny
Related terms: penny
4. [ noun ] (informal) uncomplimentary terms for a policeman
Synonyms: cop pig fuzz bull
Related terms: policeman colloquialism
5. [ verb ] coat with a layer of copper
Related terms: coat
6. [ noun ] Last name, frequency rank in the U.S. is 6270
7. [ noun ] (zoology) any of various small butterflies of the family Lycaenidae having copper colored wings
Related terms: lycaenid American_copper Lycaena
Similar spelling:   coppery