/ Dictionary / Index P postern: Meaning and Definition of Find definitions for: pos•tern Pronunciation: (pō'sturn, pos'turn), [key] — n. a back door or gate. a private entrance or any entrance other than the main one. —adj. of, pertaining to, or resembling a postern. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: postern (Thesaurus) posterization poster paint Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language