semaphore signal
A 'semaphore signal' is a visual communication method used historically in rail and maritime contexts to convey information through the position of flags or mechanical arms.
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Definition
B2Rail Transport
(technical, historical)A railway signal with a movable arm on a post, indicating whether a train should stop, proceed, or approach with caution.
Example
- The semaphore signal's arm was raised, allowing the train to continue its journey.
- Old railway lines often feature semaphore signals as part of their historic charm.
B2General Communication
(technical)A visual signaling system using flags, lights, or mechanical arms to convey messages over a distance.
Example
- The ship's crew used semaphore signals to communicate with the port.
- Semaphore signals were an essential part of early communication systems before the advent of radio.
Similar
Terms that have similar or relatively close meanings to "semaphore signal":