WordReference Random House Unabridged Dictionary of American English © 2017
fa•nat•i•cism  (fə natə sīz′əm),USA pronunciation n. 
  1. fanatical character, spirit, or conduct.
  • fanatic + -ism 1705–15


Collins Concise English Dictionary © HarperCollins Publishers::

fanaticism /fəˈnætɪˌsɪzəm/ n
  1. wildly excessive or irrational devotion, dedication, or enthusiasm



'fanaticism' also found in these entries:
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