a·li·en

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.

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: a story 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

To transfer (property) to another; alienate.