Noun
1. 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
2. a copper penny
3. uncomplimentary terms for a policeman
4. a reddish brown the color of polished copper
5. any of various small butterflies of the family Lycaenidae having copper colored wings