Definition of aîné in English:

aîné

Pronunciation /eɪˈneɪ/

adjective

(also ainé)
  • Used as a postpositive, usually after a surname, to designate the older or oldest of two or more members of the same family. Compare "senior", "cadet", and "cadette".

    Chiefly in French or French-speaking contexts.

Origin

Mid 19th century. From French aîné ayne. Compare earlier ayne, eigne.