- a malleable, ductile, metallic element having a characteristic reddish-brown color: used in large quantities as an electrical conductor and in the manufacture of alloys, as brass and bronze. Symbol: Cu; atomic weight: 63.54; atomic number: 29; specific gravity: 8.92 at 20°C.
- a metallic reddish brown.
- a coin composed of copper, bronze, or the like, as the U.S. cent or the British penny.
- any of several butterflies of the family Lycaenidae, as Lycaena hypophleas(American copper ), having copper-colored wings spotted and edged with black.
- a container made of copper.
- a tool partly or wholly made of copper: a soldering copper.
- a large kettle, now usually made of iron, used for cooking or to boil laundry.
- made of copper: copper kettles.
- reddish-brown; coppery: The copper sun sank into the sea.
- to cover, coat, or sheathe with copper.
- hedge (def. 6).
- a malleable ductile reddish metallic element occurring as the free metal, copper glance, and copper pyrites: used as an electrical and thermal conductor and in such alloys as brass and bronze. Symbol: Cu; atomic no: 29; atomic wt: 63.546; valency: 1 or 2; relative density: 8.96; melting pt: 1084.87±+0.2°C; boiling pt: 2563°C
- (as modifier)
- the reddish-brown colour of copper
- (as adjective)
- any copper or bronze coin
- a large vessel, formerly of copper, used for boiling or washing
- any of various small widely distributed butterflies of the genera Lycaena, Heodes, etc, typically having reddish-brown wings: family Lycaenidae
- to coat or cover with copper
- a slang word for policeman Often shortened to: cop
