microphone Syllabification: (mi·cro·phone)Pronunciation: /ˈmīkrəˌfōn/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: /ˌmīkrəˈfänik/ adjective microphone in other Oxford dictionaries Definition of microphone in the British & World English dictionary