名詞 expatriate:

1. voluntarily absent from home or country
   同義詞：exile

動詞 expatriate:

1. expel from a country
   同義詞：deport, exile
2. move away from one's native country and adopt a new residence abroad

ex.pa.tri.ate

v.（動詞）
ex.pa.tri.at.ed,ex.pa.tri.at.ing,ex.pa.tri.ates
v.tr.（及物動詞）
To send into exile.See Synonyms at banish
流放參見 banish
To remove (oneself) from residence in one`s native land.
移居國外
v.intr.（不及物動詞）
To give up residence in one`s homeland.
移居國外：放棄在自己國家居住
To renounce allegiance to one`s homeland.
放棄原國籍：放棄自己的國籍
n.（名詞）

One who has taken up residence in a foreign country.
移居國外者：居住在國外的人
One who has renounced one`s native land.
放棄自己國籍的人
adj.（形容詞）

Residing in a foreign country; expatriated.
定居在國外的；移居國外的

來源：
Medieval Latin expatri3re expatri3t-
中世紀拉丁語 expatri3re expatri3t-
Latin ex- [ex-]
拉丁語 ex- [前綴，表.從前的，前任的.]
Latin patria [native land] from patrius [paternal] from pater [father] * see p…ter-
拉丁語 patria [本國] 源自 patrius [父親的] 源自 pater [父親] *參見 p…ter-

【引伸】
expa.tria.tion
n.（名詞）