copper (noun) /ˈkɑ.pɚ/
1
(uncountable) A reddish-brown, malleable, ductile metallic element with high electrical and thermal conductivity, symbol Cu, and atomic number 29.
2
The reddish-brown colour/color of copper.
3
(entomology) Any of various lycaenid butterflies with copper-coloured upperwings, especially those of the genera Lycaena and Paralucia.
4
(slang, law enforcement) A police officer.
copper (verb) /ˈkɑ.pɚ/
1
To sheathe or coat with copper.
copper (adjective) /ˈkɑ.pɚ/
1
Made of copper.
2
Having the reddish-brown colour/color of copper.