con·duc·tor / kənˈdəktər/ • n. 1. a person who directs the performance of an orchestra or choir.2. a person in charge of a train, streetcar, or other public conveyance, who collects fares and sells tickets.3. Physics a material or device that conducts or transmits heat, electricity, or sound, esp. when regarded in terms of its capacity to do this. ∎ another term for lightning rod. DERIVATIVES: con·duc·to·ri·al / ˌkänˌdəkˈtôrēəl; kən-/ adj.con·duc·tor·ship / -ˌship/ n. (in sense 1).

conductor Substance or object that allows easy passage of free electrons. Conductors have low electrical resistance that opposes the flow. Metals, the best conductors, have free electrons that become an electric current when moved. The resistance of metal conductors increases with temperature because the lattice vibrations of atoms increase and scatter the free electrons.

conductor Substance or object that allows easy passage of free electrons. Conductors have low electrical resistance that opposes the flow. Metals, the best conductors, have free electrons that become an electric current when moved. The resistance of metal conductors increases with temperature because the lattice vibrations of atoms increase and scatter the free electrons.

conductor (kŏn-duk-ter) n.
1. (in physics) a substance capable of transmitting heat (e.g. copper, silver) or electricity.

2. (in surgery) a grooved surgical director.