noun, plural in·san·i·ties.
- extreme foolishness; folly; senselessness; foolhardiness: Trying to drive through that traffic would be pure insanity.
- a foolish or senseless action, policy, statement, etc.: We've heard decades of insanities in our political discourse.
Origin of insanity
Examples from the Web for insanity
AIDS insanity: When running for the US Senate in 1992, Huckabee called for a quarantine of people who had AIDS.
Insanity, after all, is doing the same thing and expecting a different result, right?
But as Nietzsche once wrote, “In individuals, insanity is rare; but in groups, parties, nations, and epochs, it is the rule.”Doctors Have No Answers for Colombian Teens' Mass Hysteria|Kent Sepkowitz|September 3, 2014|DAILY BEAST
On appeal in 2006, she was found to be not guilty by reason of insanity and remanded to a psychiatric hospital.Postpartum Stigma: Why My Patient Committed Suicide|Jean Kim|August 5, 2014|DAILY BEAST
It demands with monumental courage, a high tolerance for pain, and at least a touch of insanity.The World Series of Cliff Diving Takes Itself Very Seriously|Hampton Stevens|June 29, 2014|DAILY BEAST
Upon the excesses, bordering on insanity, followed the other extreme,—the most rigid abstinence.Woman under socialism|August Bebel
No; what was alarming at Poor Luck Barrens was not a frenzy of insanity—it was the delirium of pneumonia.Billy Topsail, M.D.|Norman Duncan
The features of his insanity were wilder and less controllable.Tom Burke Of "Ours", Volume I (of II)|Charles James Lever
To him came these men broken down, some on the verge of insanity.The Harbor|Ernest Poole
Insanity, on the other hand, is a disease which destroys or clouds an intellect which has once been developed.Consanguineous Marriages in the American Population|George B. Louis Arner
noun plural -ties
1580s, "state of being insane," from Latin insanitatem (nominative insanitas) "unhealthfulness," noun of quality from insanus (see insane). Meaning "extreme folly" is from 1844.