[nohn kohm-pohs men-tis; English non kom-puh s men-tis] /ˈnoʊn ˈkoʊm poʊs ˈmɛn tɪs; English ˈnɒn ˈkɒm pəs ˈmɛn tɪs/

adjective, Latin.
not of sound mind; mentally incapable of managing one’s affairs.
/ˈnɒn ˈkɒmpəs ˈmɛntɪs/
mentally incapable of managing one’s own affairs; of unsound mind

Latin, literally “not master of one’s mind.”

non compos mentis non com·pos men·tis (nŏn kŏm’pəs měn’tĭs)
Not of sound mind and hence not legally responsible; mentally incompetent.
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.”


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