conductor

noun

1.
the person who leads a musical group
director music director
Derived from:
conduct
2.
a substance that readily conducts e.g. electricity and heat
Antonym:
insulator
Derived from:
conduct
3.
the person who collects fares on a public conveyance
4.
a device designed to transmit electricity, heat, etc.
outlead
Derived from:
conduct