/ Dictionary / Index P posterity: Meaning and Definition of Find definitions for: pos•ter•i•ty Pronunciation: (po-ster'i-tē), [key] — n. succeeding or future generations collectively: Judgment of this age must be left to posterity. all descendants of one person: His fortune was gradually dissipated by&hasp; his&hasp; posterity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: posterity (Thesaurus) posterior pituitary posterization Related Content Daily Word Quiz: jovial Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language