American English

Definition of foghorn noun from the Oxford Advanced American Dictionary

 

foghorn

 noun
noun
NAmE//ˈfɔɡhɔrn//
 
, NAmE//ˈfɑɡhɔrn//
 
 
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an instrument that makes a loud noise to warn ships of danger in fog He's got a voice like a foghorn (= a loud unpleasant voice).
See the Oxford Advanced Learner's Dictionary entry: foghorn