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English definition of “tannoy”

tannoy

noun [no plural]   /ˈtænɔɪ/ UK trademark (also UK/US public address system)
a system of equipment used in public places that someone speaks into in order to make their voice loud enough to be heardAmplifiers, microphones and speakers
(Definition of tannoy noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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