First Known Use: circa 1550
Dictionary
insane
adjective in·sane \(ˌ)in-ˈsān\
Definition of INSANE
1
: mentally disordered : exhibiting insanity
2
: used by, typical of, or intended for insane persons <an insane asylum>
3
: absurd <an insane scheme for making money>
See insane defined for English-language learners
See insane defined for kids
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Origin of INSANE
Latin insanus, from in- + sanus sane
Related to INSANE
- 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, kooky (also kookie), loco [slang], loony (also looney), loony tunes (or looney tunes), lunatic, mad, maniacal (also maniac), mental, meshuga (or meshugge also meshugah or meshuggah), moonstruck, non compos mentis, nuts, nutty, psycho, psychotic, scatty [chiefly British], screwy, unbalanced, unhinged, unsound, wacko (also whacko), wacky (also whacky), wud [chiefly Scottish], around the bend, off one's gourd, off one's head, off one's rocker, out of one's head (or mind), out to lunch [slang]
- Antonyms
- balanced, compos mentis, sane, sound, uncrazy
Other Psychology Terms
INSANE Defined for Kids
insane
adjective in·sane \in-ˈsān\
Definition of INSANE for Kids
1
: not normal or healthy in mind
2
: used by or for people who are insane <an insane asylum>
3
: very foolish or unreasonable
— in·sane·ly adverb
Medical Dictionary
insane
adjective in·sane \(ˈ)in-ˈsān\
Medical Definition of INSANE
1
: mentally disordered : exhibiting insanity
2
: used by, typical of, or intended for insane persons <an insane asylum>
—in·sane·ly adverb
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