definition of
copper

[1] #1 copper n. [Cu, atomic number 29] 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. wn

[2] #2 copper v. coat with a layer of copper. wn

[3] #3 copper n. a copper penny. wn

[4] #4 copper n. [bull, cop, fuzz, pig] uncomplimentary terms for a policeman. wn

[5] #5 copper n. [copper color] a reddish-brown color resembling the color of polished copper. wn