copper

Copper is a reddish-gold colored metal that's commonly used in electrical wires and plumbing. Your grandmother might make her famous chocolate caramel sauce in a shiny copper pot.

Before 1983, pennies were 95 percent copper. Today, they're almost entirely zinc (a less expensive metal), coated with a thin copper plating. They look the same, but the older coins are quite a bit heavier. Copper is a good conductor of heat and electricity, which is why it's used for both fancy cookware and wires. You can also use copper for things that have a similar color: "His copper curls make him stand out from the other choir members."

Primary Meanings of copper

1.
nv
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
coat with a layer of copper
2.
n
a reddish-brown color resembling the color of polished copper
3.
n
any of various small butterflies of the family Lycaenidae having coppery wings
4.
n
uncomplimentary terms for a policeman
Full Definitions of copper
1

n 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

Synonyms:
Cu, atomic number 29
Types:
blister copper
an impure form of copper having a black blistered surface
Type of:
metal, metallic element
any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
conductor
a substance that readily conducts e.g. electricity and heat

n a copper penny

Type of:
cent, centime, penny
a coin worth one-hundredth of the value of the basic unit

v coat with a layer of copper

Type of:
coat, surface
put a coat on; cover the surface of; furnish with a surface
2

n a reddish-brown color resembling the color of polished copper

Synonyms:
copper color
Type of:
Venetian red, burnt sienna, mahogany, reddish brown, sepia
a shade of brown with a tinge of red
3

n any of various small butterflies of the family Lycaenidae having coppery wings

Types:
American copper, Lycaena hypophlaeas
common copper butterfly of central and eastern North America
Type of:
lycaenid, lycaenid butterfly
any of various butterflies of the family Lycaenidae
4

n uncomplimentary terms for a policeman

Synonyms:
bull, cop, fuzz, pig
Type of:
officer, police officer, policeman
a member of a police force

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.