1.
the person who leads a musical group
2.
a device designed to transmit electricity, heat, etc.
3.
a substance that readily conducts e.g. electricity and heat
4.
the person who collects fares on a public conveyance
In November 1999, two women were killed by a lightning bolt. The underwire located in their bras acted as a electrical conductors, and when the lightning bolt hit the bra they left burn marks on their chest.