/ Dictionary / Index P postmillennial: Meaning and Definition of Find definitions for: post•mil•len•ni•al Pronunciation: (pōst"mi-len'ē-ul), [key] — adj. of or pertaining to the period following the millennium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: postmillennial (Thesaurus) postmillenarianism postmillennialism Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language