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sui juris

[soo-ahy joo r-is, soo-ee]
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adjective Law.
  1. capable of managing one's affairs or assuming legal responsibility.
Compare alieni juris.

Origin of sui juris

First recorded in 1605–15, sui juris is from the Latin word suī jūris of one's own right
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for sui juris

sui juris

adjective
  1. (usually postpositive) law of full age and not under disability; legally competent to manage one's own affairs; independent

Word Origin

C17: from Latin, literally: of one's own right
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sui juris

1610s, "of full legal age and capacity," in ancient Rome, "of the status of one not subject to the patria potestas." For first element, see sui generis; for second element, see jurist.

Online Etymology Dictionary, © 2010 Douglas Harper