vocalism Syllabification: (vo·cal·ism)Pronunciation: /ˈvōkəˌlizəm/Definition of vocalism noun 1the use of the voice or vocal organs in speech. the skill or art of exercising the voice in singing. 2 Phonetics a vowel sound or articulation. a system of vowels used in a given language. vocalism in other Oxford dictionaries Definition of vocalism in the British & World English dictionary