/ Dictionary / Index I ideate: Meaning and Definition of Find definitions for: i•de•ate Pronunciation: (v.ī'dē-āt", ī-dē'ātn.ī'dē-āt", ī-dē'it), [key] — v., n. -at•ed, -at•ing, —v.t. to form an idea, thought, or image of. —v.i. to form ideas; think. —n. ideatum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ideate (Thesaurus) idea of pure reason ideation Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language