Coppers meaning : 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. Any of various specialized items that are made of copper, where the use of copper is either traditional or vital to the function of the item. Any of various lycaenid butterflies with copper-coloured upperwings, especially those of the genera Lycaena and Paralucia. (law enforcement) A police officer.