/ Dictionary / Index U ultimogeniture: Meaning and Definition of Find definitions for: ul•ti•mo•gen•i•ture Pronunciation: (ul"tu-mō-jen'i-chur, -choor"), [key] — n. postremogeniture. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ultimo ultisol Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language