microtone Syllabification: (mi·cro·tone)Pronunciation: /ˈmīkrəˌtōn/Definition of microtone noun Music an interval smaller than a semitone. Derivatives microtonalPronunciation: /ˌmīkrəˈtōnl/ adjective microtonalityPronunciation: /ˌmīkrətōˈnalətē/ noun microtonallyPronunciation: /ˌmīkrəˈtōnl-e/ adverb microtone in other Oxford dictionaries Definition of microtone in the British & World English dictionary