/ Dictionary / Index P posteriority: Meaning and Definition of Find definitions for: pos•te•ri•or•i•ty Pronunciation: (po-stēr"ē-ôr'i-tē, -or'-, pō-), [key] — n. the state or quality of being posterior. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: posteriority (Thesaurus) posterior posterior pituitary Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language