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[Latin, Of his or her own right.]
Possessing full social and Civil Rights; not under any legal disability, or the power of another, or guardianship. Having the capacity to manage one's own affairs; not under legal disability to act for one's self.
sui juris‘subject to his own law’, an independent legal person.
SUI JURIS. One who has all the rights to which a freemen is entitled; one
who is not under the power of another, as a slave, a minor, and the like.
2. To make a valid contract, a person must, in general, be sui juris. Every one of full age is presumed to be sui juris. Story on Ag. p. 10.