Meaning

noun a person who is voluntarily absent from home or country

verb expel from a country

verb move away from one's native country and adopt a new residence abroad

originThe verb is first attested in 1787, the adjective and noun in 1812; borrowed from Medieval Latin expatriātus, perfect passive participle of expatriō (“to banish”) (see -ate (etymology 1,2 and 3)), from Latin ex- (“out of”) + patria (“native land”) + -ō (verb-forming suffix); possibly after French expatrier and expatrié.

Etymology from Wiktionary, CC BY-SA 3.0