alien

Alien is defined as a resident from another country who does not have citizenship in the country of residence.

(noun)

A person from the United States living in Italy without citizenship is an example of an alien.

The definition of alien is residing in a country without having residency there.

(adjective)

A person living in Ireland without having citizenship there is alien.

Alien means different, generally to the point of incompatibility.

(adjective)

The idea of multiple gods is an example of something that is alien to many monotheistic people.

See alien in Webster's New World College Dictionary

adjective

Origin: ME & OFr < L alienus < alius, other: see else

noun

a foreigner
a foreign-born resident in a country who has not become a naturalized citizen
an outsider
in science fiction, a being in or from outer space and not native to the Earth; extraterrestrial

transitive verb

to transfer (land, property, etc.)

Origin: ME alienen < OFr aliener < L alienare

See alien in American Heritage Dictionary 4

adjective

Owing political allegiance to another country or government; foreign: alien residents.
Belonging to, characteristic of, or constituting another and very different place, society, or person; strange. See Synonyms at foreign.
Dissimilar, inconsistent, or opposed, as in nature: emotions alien to her temperament.

noun

An unnaturalized foreign resident of a country. Also called noncitizen.
A person from another and very different family, people, or place.
A person who is not included in a group; an outsider.
A creature from outer space: a story about an invasion of aliens.
Ecology An organism, especially a plant or animal, that occurs in or is naturalized in a region to which it is not native.