/ Dictionary / Index P postulator: Meaning and Definition of Find definitions for: pos•tu•la•tor Pronunciation: (pos'chu-lā"tur), [key] — n. Rom. Cath. Ch. a priest who presents a plea for a beatification or the canonization of a beatus. Cf.(def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: postulator (Thesaurus) postulate postural drainage Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language