conductor Definition

1. The person who conducts a choir or orchestra.
2. A material that allows heat to flow through it by the process of conduction.

Form: thermal conductor (in full)
3. A material that allows electricity to flow through it by the process of conduction.

Form: electrical conductor (in full)
4. Someone who collects fares from passengers on a bus, etc.
5. A leader or guide.
(N Amer)
6. The official in charge of a train.