Longman Dictionary of Contemporary English homepage

loudhailer

 noun
     
loudhailer
Related topics: Communications
loud‧hail‧er [countable]
British EnglishTC a piece of equipment with a microphone, that you can hold in your hand and speak through to make your voice louder [= megaphone; = bullhorn AmE]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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