- ⌂ Historical the man in charge of a wagon train
- a railroad official in charge of some division of a line
- A superintendent or supervisor of an American U.S. freight railroad. The trainmaster is responsible for enforcing policies of the rail company, for train movements, locomotive assignments, crew assignments, personnel management, discipline, derailments and more. In the past, trainmasters were promoted brakemen or conductors who retained their union seniority.