Meaning

adjective not contained in or deriving from the essential nature of something

noun a person who comes from a foreign country; someone who does not owe allegiance to your country

verb transfer property or ownership

originFrom Middle English alien, a borrowing from Old French alien, aliene, from Latin aliēnus (“belonging to someone else”, later “exotic, foreign”), from Latin alius (“other”), from Proto-Indo-European *h₂élyos. Related to English else.

Etymology from Wiktionary, CC BY-SA 3.0