SATANISM Meaning of SATANISM in English sa ‧ tan ‧ is ‧ m /ˈseɪt ə nɪz ə m/ BrE AmE noun [uncountable] the practice of worshipping Satan —satanist noun [countable]—satanist adjective Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012