Birth"right` (?), 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.
Lest there be any . . . profane person, as Esau, who for one morsel of meat sold his birthright.
Heb. xii. 16.
© Webster 1913. | 
