noun, masculine/o.bɛ̃/plural: aubains
a foreigner who was not naturalised, and who had few rights; a foreigner or alien
Synonyms: étranger, métèque
Antonyms: régnicole, sujet, autochtone, citoyen
Uncertain. The TLF suggests a derivation from Frankish *alibanni (“a person belonging to another ban”). Another possible source is Latin *alibanus (“person from elsewhere”), from alibī (“elsewhere”).