American English

Definition of bullhorn noun from the Oxford Advanced American Dictionary

 

bullhorn

 noun
noun
NAmE//ˈbʊlhɔrn//
 
 
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an electronic device, shaped like a horn, with a microphone at one end, that you speak into in order to make your voice louder so that it can be heard at a distance compare megaphone
See the Oxford Advanced Learner's Dictionary entry: bullhorn