vitalismPronunciation: /ˈvʌɪt(ə)lɪz(ə)m/Definition of vitalism noun [mass 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: /-ˈlɪstɪk/ adjective Origin: early 19th century: from French vitalisme, or from vital + -ismvitalism in other Oxford dictionaries Definition of vitalism in the US English dictionary