non compos mentis
adjective
non com·pos men·tis ˌnän-ˌkäm-pəs-ˈmen-təs 
ˌnōn-
: not of sound mind
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]
See all Synonyms & Antonyms 
Example Sentences
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
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
non compos mentis
adjective
as in psychotic
having or showing a very abnormal or sick state of mind will seek to prove that the elderly tycoon was non compos mentis when he dictated that will Synonyms & Similar Words
Relevance
- psychotic
- nuts
- mad
- gaga
- lunatic
- insane
- mental
- maniac
- crazy
- meshugge
- paranoid
- psycho
- paranoidal
- meshugah
- around the bend
- looney tunes
- disturbed
- maniacal
- loony tunes
- cracked
- bats
- cuckoo
- strange
- out to lunch
- crackbrained
- crackers
- out of one's mind
- crazed
- wacko
- off one's gourd
- ballistic
- bedlam
- demented
- off one's rocker
- unhinged
- haywire
- out of one's head
- loco
- moonstruck
- batty
- bonkers
- crackpot
- fruity
- meshuga
- off one's head
- meshuggah
- unbalanced
- nutty
- daffy
- deranged
- depressed
- irrational
- wud
- daft
- barmy
- eccentric
- whacko
- foolish
- loony
- looney
- screwy
- wacky
- certifiable
- touched
- whacky
- bughouse
- obsessed
- kooky
- fey
- kookie
- odd
- off
- unsound
- scatty
- queer
- balmy
- distracted
- brainsick
- nuclear
- distraught
- unreasonable
- cranky
- disordered
- neurotic
- schizophrenic
- loopy
- potty
- bananas
- dotty
- schizoid
- aberrant
- hysterical
- frantic
- sociopathic
- paranoiac
- oddball
- pixilated
- delusional
- delirious
- ape
- tetched
- hysteric
- berserk
- raving
- paranoic
- teched
- delusionary
- witless
- amok
- pixillated
- fixated
- monomaniac
- obsessive-compulsive
- amuck
- senseless
- monomaniacal
- frenzied
- wigged-out
Antonyms & Near Antonyms
- compos mentis
- sound
- balanced
- reasonable
- clear
- sane
- rational
- lucid
- uncrazy
- wise
- judicious
- normal
- sensible
- healthy
- well-adjusted
- unneurotic