foghorn

fog·horn  (fôghôrn, fg-)

n.

1. Nautical A horn for sounding warning signals in fog or darkness, used especially on ships, buoys, and coastal installations.

2. A booming, insistent voice.

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foghorn

Noun

a large horn sounded at intervals as a warning to ships in fog

Thesaurus

Noun	1.	foghorn - a loud low warning signal that can be heard by fogbound ships fogsignal alarum, warning signal, alarm, alert - an automatic signal (usually a sound) warning of danger
	2.	foghorn - a warning device consisting of a horn that generates a loud low tone diaphone - a foghorn that makes a signal consisting of two tones horn - an alarm device that makes a loud warning sound signaling device - a device used to send signals