Meaning of “conductor” - Learner’s Dictionary

conductor

noun [ C ] uk us /kənˈdʌktər/
MUSIC

B2 someone who stands in front of a group of musicians or singers and controls their performance

BUS

someone whose job is to sell or check tickets on a bus, train, etc

TRAIN US (UK guard)

someone whose job is to be responsible for a train and the people who work on it

HEAT

a substance that allows electricity or heat to go through it

(Definition of “conductor” from the Cambridge Learner’s Dictionary © Cambridge University Press)