copper

soft shiny metal of a reddish brown color that heat moves through easily, often made into wire

The reddish-brown colour of copper.

(UK, slang) A police officer, especially one in uniform.

(slang, old-fashioned) Chiefly preceded by a descriptive word: a private detective or a security guard.

A coin, typically of a small denomination, originally made of copper and now chiefly of other metals such as bronze; specifically, an English or British penny or halfpenny; also, a United States cent; (uncountable)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 collectively.

In full copper butterfly: any of various lycaenid butterflies with copper-coloured upperwings, especially those of the genera Lycaena and Paralucia.

(old-fashioned) Any of various specialized items made of copper, where the use of the metal is either necessary or traditional to the function of the item.

(old-fashioned) A copper mug used for drinking alcoholic beverages.

(old-fashioned) A copper sheet on which an image or writing is engraved.

(UK, old-fashioned) A large pot, originally made of copper but later often of iron, filled with water and heated over a fire for cooking, washing clothes, etc.

(UK, Australia) An informer.

(UK, slang) A person working as an informer for the police; a nark

(UK, slang) A prisoner who informs on fellow prisoners.

(US, old-fashioned) In the game of faro: originally a copper coin, now usually a small disc or token, placed on a playing card to indicate that a player bets against that card.

A component of the cop (“conical ball of thread wound on to the spindle”) in a spinning machine.

To coat or sheathe (something) with copper.

(UK, slang) To inform on (someone) to the police; to nark.

(UK, slang) To inform on someone to the police.

(US) In the game of faro: to place a copper coin, or now usually a small disc or token, on (a playing card) to indicate that a player bets against that card.

(US, figurative) To bet against (something).

To give (something) a colour by applying a copper salt.

(old-fashioned) To give copper coins to (someone); to pay.

(slang, no longer used) To arrest (someone).

Made of copper.

Having the reddish-brown colour of copper.