Merriam-Webster's Collegiate® Dictionary, 11th Edition
ALIEN
I. adjective
Etymology: Middle English, from Anglo-French, from Latin alienus, from alius
Date: 14th century
1. belonging or relating to another person, place, or thing ; strange , relating, belonging, or owing allegiance to another country or government ; foreign , exotic 1, differing in nature or character typically to the point of incompatibility, see: extrinsic alienly adverb alienness noun
II. noun
Date: 14th century
a person of another family, race, or nation, a foreign-born resident who has not been naturalized and is still a subject or citizen of a foreign country, extraterrestrial , exotic 1,
III. transitive verb
Date: 14th century
alienate , estrange , to make over (as property)