/ Dictionary / Index I incendiarism: Meaning and Definition of Find definitions for: in•cen•di•a•rism Pronunciation: (in-sen'dē-u-riz"um), [key] — n. the act or practice of an arsonist; malicious burning. inflammatory behavior; agitation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: incendiarism (Thesaurus) incautious incendiary Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language