foghorn

Noun
  1. A loud low warning signal that can be heard by fogbound ships (synset 107280087)
    is a type of: alarm, alarum, alert, warning signal - an automatic signal (usually a sound) warning of danger
    same as: fogsignal
  2. A warning device consisting of a horn that generates a loud low tone (synset 103380017)
    is a type of:
    • horn - an alarm device that makes a loud warning sound
    • signaling device - a device used to send signals
    subtypes: diaphone - a foghorn that makes a signal consisting of two tones

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