A right of inheritance belonging to the firstborn son. In a broad sense, the birthright includes any or all rights or inheritance transmitted to a person when he is born into a family and culture.

Sell me this day thy birthright, Gen. 25: 29-34 (Gen. 27: 36). The firstborn sat according to his birthright, Gen. 43: 33. He set Ephraim before Manasseh, Gen. 48: 14-20 (Jer. 31: 9). The birthright was Joseph's, 1 Chr. 5: 2. Esau sold his birthright, Heb. 12: 16. Ye are lawful heirs, D&C 86: 9. Zion has a right to the priesthood by lineage, D&C 113: 8 (Abr. 2: 9-11).