\Eigne\, a. [OF. aisn['e], ainsn['e], F. a[^i]n['e], fr.
L. ante natus born before. Cf. {Esnecy}.]
1. (Law) Eldest; firstborn. --Blackstone.
2. Entailed; belonging to the eldest son. [Obs.]
{Bastard eigne}, a bastard eldest son whose parents
   afterwards intermarry.