alien

noun

1.
a person who comes from a foreign country; someone who does not owe allegiance to your country
elend fremder fremmedling orlander outcomeling foreigner noncitizen outlander
Derived from:
alien
2.
anyone who does not belong in the environment in which they are found
stranger unknown
Derived from:
alien
3.
a form of life assumed to exist outside the Earth or its atmosphere
elster otherling rodderling extraterrestrial extraterrestrial being
Derived from:
alien