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non compos mentis

[ nohn-kohm-pohs men-tis; English non-kom-puhs men-tis ]
/ ˈnoʊn ˈkoʊm poʊs ˈmɛn tɪs; English ˈnɒn ˈkɒm pəs ˈmɛn tɪs /
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adjective Latin.
not of sound mind; mentally incapable of managing one's affairs (used especially in a legal context).Compare compos mentis.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use non compos mentis in a sentence

British Dictionary definitions for non compos mentis

non compos mentis
/ Latin (ˈnɒn ˈkɒmpəs ˈmɛntɪs) /

adjective
mentally incapable of managing one's own affairs; of unsound mind

Word Origin for non compos mentis

Latin: not in control of one's mind
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

Cultural definitions for non compos mentis

non compos mentis
[ (non kom-puhs men-tis) ]

A phrase used to describe someone who is out of his or her mind and therefore not legally responsible for his or her actions: “It was determined by the court that the killer was non compos mentis.” From Latin, meaning “not having control of the mind.”

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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