(kop′ər) noun
1. A reddish, ductile, metallic element (symbol Cu, atomic number 29) occurring native and in combination, and a very good conductor of heat and electricity. See PERIODIC TABLE.
2. An article made of this metal; specifically, a vessel in which clothes are boiled.
3. A coin made of copper.
4. Any of several shades of rich, lustrous, reddish-brown, similar to the color of polished copper.
—v.t.
1. To cover or coat with copper.
2. Slang To bet against. [OE coper <LL cuprum <L (aes) cyprium Cyprian (metal) <Gk. kyprios <Kypros Cyprus]
—cop′per·y adjective

(kop′ər) noun Slang
A policeman; detective; cop. [<COP²]