term:

Expatriate

expatriate vb

-at·ed
-at·ing
vt
: to voluntarily withdraw (oneself) from allegiance to one's native country
vi
: to renounce allegiance to one's country and abandon one's nationality voluntarily
ex·pa·tri·ate [-trē-ət]
n

ex·pa·tri·a·tion [ek-spā-trē-ā-shən]
n

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.