(uncountable) A reddish-brown, malleable, ductile metallic element with high electrical and thermal conductivity, symbol Cu, and atomic number 29. / The reddish-brown colour/color of copper.

Made of copper. / Having the reddish-brown colour/color of copper.

To sheathe or coat with copper.

(slang, law enforcement) A police officer.

simple past tense and past participle of copper

(nautical) (of the hull of a wooden ship) sheathed below the waterline with thin sheets of copper to prevent the attack of teredo shipworms and limit the buildup of weed

plural of copper

present participle of copper

The act of covering with copper. / An envelope or covering of copper.

plural of coppering