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insanity

Syllabification: (in·san·i·ty)

Pronunciation: /inˈsanitē/

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Definition of insanity

noun

the state of being seriously mentally ill; madness:he suffered from bouts of insanity [as complement]:he attempted to plead insanity
extreme foolishness or irrationality:it might be pure insanity to take this loan the insanities of our time