copper

A reddish-brown metallic chemical element (symbol Cu) with the atomic number 29; also, the metal made up of this element

• Here are a few coppers.

  Tatoeba · sundown · CC BY 2.0 FR

• Copper and silver are both metals.

  Tatoeba · CK · CC BY 2.0 FR

The reddish-brown colour of copper (etymology 1, noun sense 1)

The reddish-brown colour of copper (etymology 1, noun sense 1).; In full copper butterfly: any of various lycaenid butterflies with copper-coloured upperwings, especially those of the genera Lycaena and Paralucia

Any of various specialized items made of copper (etymology 1, noun sense 1), where the use of the metal is either necessary or traditional to the function of the item

Any of various specialized items made of copper (etymology 1, noun sense 1), where the use of the metal is either necessary or traditional to the function of the item.; A copper mug used for drinking alcoholic beveragesrare

Any of various specialized items made of copper (etymology 1, noun sense 1), where the use of the metal is either necessary or traditional to the function of the item.; A copper sheet on which an image or writing is engravedrare

Any of various specialized items made of copper (etymology 1, noun sense 1), where the use of the metal is either necessary or traditional to the function of the item.; A coin, typically of a small denomination, originally made of copper and now chiefly of other metals such as bronze; specifically, an English or British penny or halfpenny; also, a United States cent; (uncountable) coins made of copper collectivelyrare

Any of various specialized items made of copper (etymology 1, noun sense 1), where the use of the metal is either necessary or traditional to the function of the item.; A large pot, originally made of copper but later often of iron, filled with water and heated over a fire for cooking, washing clothes, etcrare

A police officer, especially one in uniformrare

Chiefly preceded by a descriptive word: a private detective or a security guardrare