| NOUN | communication | foghorn, fogsignal | a loud low warning signal that can be heard by fogbound ships |
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| artifact | foghorn | a warning device consisting of a horn that generates a loud low tone |
| Meaning | A loud low warning signal that can be heard by fogbound ships. | |
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| Synonym | fogsignal | |
| Broader | alarm, alert, warning signal, alarum | An automatic signal (usually a sound) warning of danger |
| Meaning | A warning device consisting of a horn that generates a loud low tone. | |
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| Narrower | diaphone | A foghorn that makes a signal consisting of two tones |
| Broader | horn | An alarm device that makes a loud warning sound |
| signaling device | A device used to send signals | |