Alien to

a resident born in or belonging to another country who has not acquired citizenship by naturalization (distinguished from ).
a foreigner.
a person who has been estranged or excluded.
a creature from outer space; .
residing under a government or in a country other than that of one’s birth without having or obtaining the status of citizenship there.
belonging or relating to aliens:
alien property.
unlike one’s own; strange; not belonging to one:
alien speech.
adverse; hostile; opposed (usually followed by to or from):
ideas alien to modern thinking.
.
noun
a person owing allegiance to a country other than that in which he lives; foreigner
any being or thing foreign to the environment in which it now exists
(in science fiction) a being from another world, sometimes specifically an extraterrestrial
adjective
unnaturalized; foreign
having foreign allegiance: alien territory
unfamiliar; strange: an alien quality in a work of art
(postpositive) and foll by to. repugnant or opposed (to): war is alien to his philosophy
(in science fiction) of or from another world
verb
(transitive) (rare) to transfer (property, etc) to another
adj.

mid-14c., “strange, foreign,” from Old French alien “alien, strange, foreign; an alien, stranger, foreigner,” from Latin alienus “of or belonging to another, foreign, alien, strange,” also, as a noun, “a stranger, foreigner,” adjectival form of alius “(an)other” (see alias). Meaning “not of the Earth” first recorded 1920. An alien priory (c.1500) is one owing obedience to a mother abbey in a foreign country.
n.

“foreigner, citizen of a foreign land,” from alien (adj.). In the science fiction sense, from 1953.
alien
(ā’lē-ən)
Introduced to a region deliberately or accidentally by humans. Starlings, German cockroaches, and dandelions are species that are alien to North America but have become widely naturalized in the continent. Compare endemic, indigenous.

a foreigner, or person born in another country, and therefore not entitled to the rights and privileges of the country where he resides. Among the Hebrews there were two classes of aliens. (1.) Those who were strangers generally, and who owned no landed property. (2.) Strangers dwelling in another country without being naturalized (Lev. 22:10; Ps. 39:12). Both of these classes were to enjoy, under certain conditions, the same rights as other citizens (Lev. 19:33, 34; Deut. 10:19). They might be naturalized and permitted to enter into the congregation of the Lord by submitting to circumcision and abandoning idolatry (Deut. 23:3-8). This term is used (Eph. 2:12) to denote persons who have no interest in Christ.