/ Dictionary / Index I idiopathy: Meaning and Definition of Find definitions for: id•i•op•a•thy Pronunciation: (id"ē-op'u-thē), [key] — pl. -thies. a disease not preceded or occasioned by any known morbid condition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: idiopathy (Thesaurus) idiopathic idioplasm Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language