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FINDLAW LEGAL DICTIONARY

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Non Compos Mentis

non compos mentis adj

[Latin, literally, not having mastery of one's mind]
: not of sound mind
: lacking mental ability to understand the nature, consequences, and effect of a situation or transaction



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