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fog signal

Line breaks: fog sig¦nal

Definition of fog signal in English:

noun

A small explosive charge which can be placed on a railway line in fog to be set off by the train as a signal to the driver.
Example sentences
  • Students were taught how to lay dummy charges and fog signals, then walk away and hide.
  • Beavertail has probably seen more types of fog signals than any other New England lighthouse station.
  • The air fog signal was replaced by an electric omnidirectional signal controlled by a fog detector.

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