Meaning of MICROPHONE in English

MICROPHONE

[informal] mike, US [informal] also mic [noun] [C] - a device that records sound or increases the loudness of sounds by changing the sound waves into electrical wavesThe interviewer asked her to speak into/use the microphone.Without a microphone, the speakers could not be heard by at least half the audience.

Cambridge English vocab.      Кембриджский английский словарь.