| Birthright (n.) Any right, privilege, or possession to which a person is entitled by birth, such as an estate descendible by law to an heir, or civil liberty under a free constitution; esp. the rights or inheritance of the first born. Thesaurus Entries appanage, appurtenance, authority, bequeathal, bequest, borough-English, claim, coheirship, conjugal right, coparcenary, demand, divine right, droit, due, entail, faculty, gavelkind, heirloom, heirship, hereditament, heritable, heritage, heritance, inalienable right, incorporeal hereditament, inheritance, interest, law of succession, legacy, line of succession, mode of succession, natural right, patrimony, perquisite, postremogeniture, power, prerogative, prescription, presumptive right, pretense, pretension, primogeniture, privilege, proper claim, property right, reversion, right, succession, title, ultimogeniture, vested interest, vested right |