/ Dictionary / Index P paroxysm: Meaning and Definition of Find definitions for: par•ox•ysm Pronunciation: (par'uk-siz"um), [key] — n. any sudden, violent outburst; a fit of violent action or emotion: paroxysms of rage. a severe attack or a sudden increase in intensity of a disease, usually recurring periodically. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: paroxysm (Thesaurus) Parousia paroxysmal tachycardia Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language