foghorn noun 2verb 2forms 3 noun2 •A very loud low-pitched horn, used especially in lighthouses and on large boats. •A strong gossiper. verb2 •To sound a foghornWith the gold evening sun burnishing our strings of signal bunting we foghorned our way up the confidently prosperous quayside of Haugesund — 2013 •To shout or bellow in a loud, deep voicethe voice of the teacher foghorned away undisturbed — 1924 formsfoghorned · foghorning · foghorns