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   In·san·i·ty

   /inˈsanədē/

   

   noun

   • 1. the state of being seriously mentally ill; madness: "he suffered from bouts of insanity" Similar mental illnessmental disordermental derangementmadnessinsanenessdementiadementednesslunacyinstabilityunsoundness of mindloss of reasondeliriumhysteriamaniapsychosisinformal:crazinessarchaic:crazednessrare:delirationOpposite sanity
   • ▪ extreme foolishness or irrationality: "it might be pure insanity to take this loan" Similar follyfoolishnessfoolhardinessidiocystupidityimbecilityasininitylunacymadnesssillinesssenselessnessbrainlessnessthoughtlessnessirrationalityillogicalityabsurdityludicrousnessridiculousnessinformal:crazinessdaftnessOpposite sense

   Word Origin late 16th century: from Latin insanitas, from insanus (see insane).

   Scrabble Points: 11

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2. People also ask

   What does insanity mean?

   • The meaning of INSANITY is a severely disordered state of the mind usually occurring as a specific disorder. How to use insanity in a sentence. On the Meaning of Insanity

   Insanity Definition & Meaning - Merriam-Webster

   www.merriam-webster.com/dictionary/insanity

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   What is mental insanity?

   • Insanity can manifest as violations of societal norms, including a person or persons becoming a danger to themselves or to other people. Conceptually, mental insanity also is associated with the biological phenomenon of contagion (that mental illness is infectious) as in the case of copycat suicides.

   Insanity - Wikipedia

   en.wikipedia.org/wiki/Insanity

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   What are the facts about insanity?

   • The straight facts about insanity are these: it has been in use in English since the late 16th century, for the first two hundred years or so carrying only the literal meaning “the condition of being mentally deranged.” In the 19th century it began to take on a looser sense, “extreme folly or unreasonableness.”

   Insanity Definition & Meaning - Merriam-Webster

   www.merriam-webster.com/dictionary/insanity

   See all results for this question

   What is a test of insanity?

   • Tests of insanity used in law are not intended to be scientific definitions of mental disorder; rather, they are expected to identify persons whose incapacity is of such character and extent that criminal responsibility should be denied on grounds of social expediency and justice.

   Insanity | Legal Definition & History | Britannica

   www.britannica.com/topic/insanity

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3. www.merriam-webster.com › dictionary › insanityInsanity Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › insanity

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   Learn the origin, synonyms, examples, and legal implications of the word insanity, which can mean a severely disordered state of the mind or extreme folly or unreasonableness. Find out the difference between insanity and related terms such as madness, lunacy, and insanitary.

4. www.dictionary.com › browse › insanityINSANITY Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › insanity

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   Insanity is a condition of being insane or deranged, or a foolish or senseless action or policy. Learn the origin, synonyms, and legal implications of insanity, and see how it is used in sentences and quizzes.

5. en.wikipedia.org › wiki › InsanityInsanity - Wikipedia

   en.wikipedia.org › wiki › Insanity

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   Insanity, madness, lunacy, and craziness are behaviors caused by certain abnormal mental or behavioral patterns. Insanity can manifest as violations of societal norms, including a person or persons becoming a danger to themselves or to other people.

6. dictionary.cambridge.org › dictionary › englishINSANITY | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   Insanity is the condition of being seriously mentally ill or an action that is stupid and likely to have extremely bad results. Learn more about the word, its synonyms, pronunciation and translations.

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9. www.oed.com › dictionary › insanity_ninsanity, n. meanings, etymology and more | Oxford English ...

   www.oed.com › dictionary › insanity_n

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   Insanity is the condition of being insane or the state of mind that impedes normal thinking, reasoning or behaviour. It can also mean extreme imprudence or senselessness. See the origin, history and examples of the word insanity.

10. www.oxfordlearnersdictionaries.com › definitioninsanity noun - Definition, pictures, pronunciation and usage ...

    www.oxfordlearnersdictionaries.com › definition

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    Learn the meaning of insanity as a noun, with synonyms, pronunciation and examples. Find out the legal and offensive implications of using insanity in different contexts.

11. www.britannica.com › topic › insanityInsanity | Legal Definition & History | Britannica

    www.britannica.com › topic › insanity

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    Insanity is a condition of mental disorder or defect that relieves persons of criminal responsibility for their conduct. Learn about the different legal tests of insanity, the controversies and criticisms, and the changes in American law following the Hinkley verdict.