insanity

noun in·san·i·ty \in-ˈsa-nə-tē\

: severe mental illness : the condition of being insane

: something that is very foolish or unreasonable

plural in·san·i·ties

Full Definition of INSANITY

: a deranged state of the mind usually occurring as a specific disorder (as schizophrenia)

: such unsoundness of mind or lack of understanding as prevents one from having the mental capacity required by law to enter into a particular relationship, status, or transaction or as removes one from criminal or civil responsibility

a : extreme folly or unreasonableness

b : something utterly foolish or unreasonable

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See insanity defined for kids

First Known Use of INSANITY

1590

Related to INSANITY

Synonyms: aberration, dementia, derangement, lunacy, madness, mania, rage [archaic]

Antonyms: mind, saneness, sanity

Other Psychology Terms

fetish, hypochondria, intelligence, mania, narcissism, neurosis, pathological, psychosis, schadenfreude, subliminal

Rhymes with INSANITY

humanity, inanity, profanity, urbanity

INSANITY Defined for Kids

insanity

noun in·san·i·ty \in-ˈsa-nə-tē\

Definition of INSANITY for Kids

: the condition of being abnormal or unhealthy in mind

Medical Dictionary

insanity

noun in·san·i·ty \in-ˈsan-ət-ē\

plural in·san·i·ties

Medical Definition of INSANITY

: a severely disordered state of the mind usually occurring as a specific disorder (as paranoid schizophrenia)

: unsoundness of mind or lack of the ability to understand that prevents one from having the mental capacity required by law to enter into a particular relationship, status, or transaction or that releases one from criminal or civil responsibility