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conductor /kənˈdʌktɚ/  

  • noun
    plural -tors
    [count] a person who stands in front of people while they sing or play musical instruments and directs their performance
    a person who collects money or tickets from passengers on a train or bus - called also (Brit) guard
    a material or object that allows electricity or heat to move through it
    Metal is a good conductor of electricity.