Refers to a person who conducts an orchestra, choir, or other musical ensemble. Also used for a person who collects fares on a train or bus, though 車掌 is more common for that meaning.
He is the conductor of a famous orchestra.
When the conductor brought down the baton, the performance began.
He is the conductor of this orchestra.
She will serve as the conductor at next year's concert.
He is already active and successful as a conductor at a young age.