DIABOLISM Meaning of DIABOLISM in English [ dʌɪ'abəlɪz(ə)m ]■ noun worship of the Devil.Derivativesdiabolist noun OriginC17: from eccles. L. diabolus or Gk diabolos 'devil' + -ism . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004