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."

Definitions of copper
  1. noun
    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
    see moresee less
    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.
    a substance that readily conducts e.g. electricity and heat
  2. noun
    a copper penny
    see moresee less
    type of:
    cent, centime, penny
    a coin worth one-hundredth of the value of the basic unit
  3. verb
    coat with a layer of copper
    see moresee less
    type of:
    coat, surface
    put a coat on; cover the surface of; furnish with a surface
  4. noun
    a reddish-brown color resembling the color of polished copper
    synonyms: copper color
    see moresee less
    type of:
    Venetian red, burnt sienna, mahogany, reddish brown, sepia
    a shade of brown with a tinge of red
  5. noun
    any of various small butterflies of the family Lycaenidae having coppery wings
    see moresee less
    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
  6. noun
    uncomplimentary terms for a policeman
    synonyms: bull, cop, fuzz, pig
    see moresee less
    type of:
    officer, police officer, policeman
    a member of a police force
Word Family
F1 image

Express yourself in 25 languages

  • Learn immersively - no memorization required
  • Build skills for real-world conversations
  • Get immediate feedback on your pronunciation
Get started for $7.99/month