a: a material or object that permits an electric current to flow easily b: a material capable of transmitting another form of energy (as heat or sound)
: a bodily part (as a nerve fiber) that transmits excitation
Any of various substances that allow the flow of electric current or thermal energy. A conductor is a poor insulator because it has a low resistance to such flow. Electrical conductors are used to conduct electric current, as in the metal wires of an electric circuit. Electrical conductors are usually metallic. Thermal conductors allow thermal energy to flow because they do not absorb radiant heat; they include materials such as metal and glass.