postremogeniture UK /ˌpɒstɹiːməʊˈd͡ʒɛnɪtjʊə/US /ˌpɑstɹimoʊˈd͡ʒɛnɪt͡ʃɚ/ noun1 •Inheritance by the last-born child of the entirety of, or of a privileged position in, a parent’s wealth, estate, or office; ultimogeniture.