non compos mentis

adjective
non com·​pos men·​tis | \ˌnän-ˌkäm-pəs-ˈmen-təs, ˌnōn-\

Definition of non compos mentis 

: not of sound mind

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Synonyms & Antonyms for non compos mentis

Synonyms

balmy, barmy [chiefly British], bats, batty, bedlam, bonkers, brainsick, bughouse [slang], certifiable, crackbrained, cracked, crackers, crackpot, cranky [dialect], crazed, crazy, cuckoo, daffy, daft, demented, deranged, fruity [slang], gaga, haywire, insane, kooky (also kookie), loco [slang], loony (also looney), loony tunes (or looney tunes), lunatic, mad, maniacal (also maniac), mental, meshuga (or meshugge), moonstruck, nuts, nutty, psycho, psychotic, scatty [chiefly British], screwy, unbalanced, unhinged, unsound, wacko (also whacko), wacky (also whacky), wud [chiefly Scottish]

Antonyms

balanced, compos mentis, sane, sound, uncrazy

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Examples of non compos mentis in a Sentence

will seek to prove that the elderly tycoon was non compos mentis when he dictated that will

First Known Use of non compos mentis

1607, in the meaning defined above

History and Etymology for non compos mentis

Latin, literally, not having mastery of one's mind

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The first known use of non compos mentis was in 1607

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More Definitions for non compos mentis

non compos mentis

adjective
non com·​pos men·​tis | \ˌnän-ˌkäm-pə-ˈsment-əs, ˌnōn- \

Medical Definition of non compos mentis 

: not of sound mind

non compos mentis

adjective
non com·​pos men·​tis | \ˈnän-ˈkäm-pəs-ˈmen-təs \

Legal Definition of non compos mentis 

: not of sound mind : lacking mental ability to understand the nature, consequences, and effect of a situation or transaction

History and Etymology for non compos mentis

Latin, literally, not having mastery of one's mind

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