Any life form of extraterrestrial or extradimensional origin. / A person, animal, plant, or other thing which is from outside the family, group, organization, or territory under consideration.

Not belonging to the same country, land, or government, or to the citizens or subjects thereof; foreign. / Very unfamiliar, strange, or removed.

(transitive) To estrange; to alienate. / (law) To transfer the ownership of something.

(archaic, followed by "from") Estranged; withdrawn in affection; foreign

(obsolete) A stranger; an alien.

To convey or transfer to another, as title, property, or right; to part voluntarily with ownership of.

Capable of being alienated, sold, or transferred to another

The act of alienating. / The state of being alienated. / Emotional isolation or dissociation. / (theater) Verfremdungseffekt. / (property law) The transfer of property to another person.

simple past tense and past participle of alienate

Isolated; excluded; estranged.