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English definition of “conductor”

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conductor

noun [C]  /kənˈdʌk·tər/ us  
a person who is in charge on a train or other public vehicle and also sells or checks tickets

conductor noun [C] (MUSIC)

a person who directs the performance of musicians or a piece of music, esp. by an orchestra: He’s the conductor of the Toronto Symphony.

conductor noun [C] (ALLOWING THROUGH)

physics, chemistry a substance that conducts electricity or heat
(Definition of conductor from the Cambridge Academic Content Dictionary © Cambridge University Press)
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