A stationmaster is a person who is in charge of a train station and makes sure everything runs smoothly.
A stationmaster is responsible and important, like a boss of the train station.
Examples:
The stationmaster helps people at the train station.
The stationmaster wears a uniform.
The stationmaster's office is at the train station.
The stationmaster knows everything about the trains.
The stationmaster is like the king of the train station.
The stationmaster makes sure the trains are on time.