a·li·en 
(ālē-ən, ālyən)
(ālē-ən, ālyən)adj.
1. Owing political allegiance to another country or government; foreign: alien residents.
2. Belonging to, characteristic of, or constituting another and very different place, society, or person; strange. See Synonyms at foreign.
3. Dissimilar, inconsistent, or opposed, as in nature: emotions alien to her temperament.
n.
Law
Law
1. An unnaturalized foreign resident of a country. Also called noncitizen.
2. A person from another and very different family, people, or place.
3. A person who is not included in a group; an outsider.
4. A creature from outer space: science fiction about an invasion of aliens.
5. Ecology An organism, especially a plant or animal, that occurs in or is naturalized in a region to which it is not native.
tr.v. a·li·ened, a·li·en·ing, a·li·ens
Law
Law
To transfer (property) to another; alienate.
[Middle English, from Old French, from Latin aliēnus, from alius, other; see al-1 in the Appendix of Indo-European roots.]