Search Result for "esau": 
Wordnet 3.0

NOUN (1)

1. (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; 



WordNet (r) 3.0 (2006):

Esau
    n 1: (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