Birth’right (-rīt), n.
(-rīt), n. [birth and right.] Any right or privilege 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. “Esau, who for one morsel of meat sold his birthright.” Heb. xii. 16.
Sense 2. It may be used in the sense of primogeniture, or the privilege of the first-born, but is applicable to any right which results from descent.