1. (

• copper ,
• Cu ,
• atomic_number_ ,

) 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. (

• copper

) a copper penny ;

3. (

• bull ,
• cop ,
• copper ,
• fuzz ,
• pig ,

) uncomplimentary terms for a policeman ;

4. (

• copper ,
• copper_color

) a reddish-brown color resembling the color of polished copper ;

5. (

• copper

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

1. (

• copper

) coat with a layer of copper ;