/ Dictionary / Index P postdiluvian: Meaning and Definition of Find definitions for: post•di•lu•vi•an Pronunciation: (pōst"di-l'vē-un), [key] — adj. existing or occurring after the Biblical Flood. —n. a person who lived after the Biblical Flood. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: postdiluvian (Thesaurus) postdeterminer postdoc Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language