signalman

signal + man

• IPA ^(key): /ˈsɪɡnəl.mən/

1. (countable) A signalman is a person who works on the railway and changes the railway signals.

   The signalman changed the light from red to green to let the train continue.

2. (countable) A signalman is a sailor who sends signals from the ship.

   The signalman waved his semaphore flags to send a message to the admiral's ship.