Conducteur
In short
A conductor is a member of a train crew responsible for the safety and operational duties of a journey. While the term is used globally, the role is often called a guard or ticket examiner in Great Britain.
In plain words
This person looks after the passengers and ensures the train runs safely. They check tickets, manage doors, and communicate with the driver. They make sure everyone follows the rules during the trip.
A simple example
A conductor walks through a carriage on a commuter train to check that everyone has a valid travel pass. They also ensure all doors are locked before the train departs the station.
Why it matters
Without a conductor, there is no one to manage passenger safety or handle emergencies on board. They act as the vital link between the driver and the people travelling.
Easy to mix up
Do not confuse a train conductor with an orchestra conductor, who leads a group of musicians.