/ Dictionary / Index P primogeniture: Meaning and Definition of Find definitions for: pri•mo•gen•i•ture Pronunciation: (prī"mu-jen'i-chur, -choor"), [key] — n. the state or fact of being the firstborn of children of the same parents. the system of inheritance or succession by the firstborn, specifically the eldest son. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: primogeniture (Thesaurus) primogenitor primordial Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language