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Train horn
01
a loud device used by trains to signal their approach or presence
Example
The engineer blew the train horn several times as a precaution when the thick fog obscured visibility.
Due to its volume, a train horn can be heard from several miles away in quiet rural areas.
Residents near the railway station are accustomed to the regular blasts of the train horn throughout the day and night.
When the train horn sounded, everyone at the crossing knew to stay clear of the tracks.
The piercing sound of the train horn echoed through the valley, warning hikers of the approaching locomotive.
