n. A very loud low-pitched horn, used especially in lighthouses and on large boats.
the GNU version of the Collaborative International Dictionary of English
n.
n. A horn that emits a loud low-pitched sound, used on ships navigating in a fog, to warn other ships of their presence.
The Century Dictionary and Cyclopedia
n. A horn used on board a vessel to sound a warning signal to other vessels in foggy weather.
n. A sounding instrument for warning vessels off shore during a fog.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a warning device consisting of a horn that generates a loud low tone
n. a loud low warning signal that can be heard by fogbound ships
Word Usage
"So I write here today once again, simply trying to be a "foghorn" in the midst of the religious smokescreens that are thrown up daily by the modern day "ministers" of God."