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sui juris adj
[Latin, of one's own right]
1 : having full legal capacity to act on one's own behalf
: not subject to the authority of another
2 : qualified to enjoy full rights of citizenship (as of holding public office or serving on a jury)
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.