Eigne (?), a. [OF. aisn'e, ainsn'e, F. ain'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.
© Webster 1913.