Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun foghorn

2 senses of foghorn

Sense 1
foghorn, fogsignal -- (a loud low warning signal that can be heard by fogbound ships)
       => alarm, alert, warning signal, alarum -- (an automatic signal (usually a sound) warning of danger)

Sense 2
foghorn -- (a warning device consisting of a horn that generates a loud low tone)
       => horn -- (an alarm device that makes a loud warning sound)
       => signaling device -- (a device used to send signals)