"copper" in the noun sense
1. copper, 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
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
any of various small butterflies of the family Lycaenidae having coppery wings
"copper" in the verb sense
coat with a layer of copper
Source: WordNet® (An amazing lexical database of English)
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