vitalism Syllabification: (vi·tal·ism)Pronunciation: /ˈvītlˌizəm/Definition of vitalism noun the theory that the origin and phenomena of life are dependent on a force or principle distinct from purely chemical or physical forces. Derivatives vitalist noun & adjective vitalisticPronunciation: /ˌvītlˈistik/ adjective Origin: early 19th century: from French vitalisme, or from vital + -ismvitalism in other Oxford dictionaries Definition of vitalism in the British & World English dictionary