/ Dictionary / Index P postmillenarianism: Meaning and Definition of Find definitions for: post•mil•le•nar•i•an•ism Pronunciation: (pōst"mil-u-nâr'ē-u-niz"um), [key] — n. postmillennialism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. postmill postmillennial 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