vocalise Syllabification: (vo·ca·lise)Pronunciation: /ˈvōkəˌlēz, ˌvōkəˈlēz/Definition of vocalise noun Music a singing exercise using individual syllables or vowel sounds to develop flexibility and control of pitch and tone. a vocal passage consisting of a melody without words:the second movement is in the spirit of a vocalisevocalise in other Oxford dictionaries Definition of vocalise in the British & World English dictionary