microphonePronunciation: /ˈmʌɪkrəfəʊn/Translate microphone | into French | into German | into Italian | into Spanish Definition of microphone noun an instrument for converting sound waves into electrical energy variations which may then be amplified, transmitted, or recorded. Derivatives microphonicPronunciation: /-ˈfɒnɪk/ adjective microphone in other Oxford dictionaries Definition of microphone in the US English dictionary