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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
- kookie
- loco [slang]
- loony
- looney
- loony tunes
- looney tunes
- lunatic
- mad
- maniacal
- maniac
- mental
- meshuga
- meshugge
- meshugah
- meshuggah
- moonstruck
- nuts
- nutty
- psycho
- psychotic
- scatty [chiefly British]
- screwy
- unbalanced
- unhinged
- unsound
- wacko
- whacko
- wacky
- whacky
- wud [chiefly Scottish]
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
Word History
Etymology
Latin, literally, not having mastery of one's mind
First Known Use
1607, in the meaning defined above
Time Traveler
The first known use of non compos mentis was
in 1607
Dictionary Entries Near non compos mentis
Cite this Entry
“Non compos mentis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/non%20compos%20mentis. Accessed 18 Aug. 2024.
Medical Definition
non compos mentis
adjective
non com·pos men·tis
ˌnän-ˌkäm-pə-ˈsment-əs, ˌnōn-
: not of sound mind
Legal Definition
non compos mentis
adjective
non com·pos men·tis
ˈnän-ˈkäm-pəs-ˈmen-təs
: not of sound mind : lacking mental ability to understand the nature, consequences, and effect of a situation or transaction
Etymology
Latin, literally, not having mastery of one's mind
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