n.(Old Testament) the eldest son of Isaac who would have inherited the covenant that God made with Abraham and that Abraham passed on to Isaac; he traded his birthright to his twin brother Jacob for a mess of pottage
英汉双解大词典
Esau/ˈiːsɔː/
1.
N（名词）
son of Isaac and Rebecca and twin brother of Jacob, to whom he sold his birthright (Genesis 25) 伊索 [Bible]