1. a person whose job is to operate railway signals
Usage: railway/railroad
2. a military person responsible for communications and signaling equipment
Usage: military
3. a person who sends or receives signals, especially visual or electronic signals

Examples

• The signalman switched the tracks to allow the express train to pass.
• Railway signalmen must be alert at all times to prevent accidents.
• The military signalman established radio contact with headquarters.
• During the war, signalmen used flags and lights to communicate between ships.
• The signalman raised his lantern to indicate the all-clear.
• Modern signalmen use computerized systems to control train movements.
• The signalman’s booth overlooked the busy railway junction.