n.[C]

1. 领导者；管理人；向导
   the conductor of an expedition

   远征队队长

2. （合唱团、乐队等的）指挥
3. （电车、巴士的）售票员；【美】（火车的）列车员
4. 【物】导体；避雷针
   Copper is a good conductor of electricity.

   铜是电的良导体。

n.

1. a person who conducts an orchestra or choir.
2. a person who collects fares on a bus.
   ▸N. Amer. a guard on a train.
3. Physics  a material or device that conducts heat or electricity.