insanity Meaning in the Cambridge English Dictionary Cambridge dictionaries logo

Meaning of “insanity” in the English Dictionary

"insanity" in British English

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insanitynoun [U]

uk   /ɪnˈsæn.ə.ti/  us   /-t̬i/
the ​condition of being ​seriouslymentallyill: He was ​found not ​guilty of ​murder by ​reason of insanity. He ​suffered from ​periodic bouts of insanity. an ​action that is ​stupid and ​likely to have ​extremelybadresults: It would be insanity to ​expand the ​business now.
(Definition of insanity from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"insanity" in American English

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insanitynoun [U]

 us   /ɪnˈsæn·ɪ·t̬i/
mentalillness: The ​juryfound him ​innocent on the ​grounds of ​temporary insanity.
(Definition of insanity from the Cambridge Academic Content Dictionary © Cambridge University Press)
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