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Showing results for insanity. Search instead for insanit.
Definitions

insanity

[in-san-i-tee] / ɪnˈsæn ɪ ti /
NOUN
mental illness; foolishness
Synonyms
STRONGEST
absurdity alienation craziness folly frenzy hysteria irresponsibility lunacy madness mental disorder
STRONG
aberration delirium delusion derangement distraction hallucination irrationality mania neurosis phobia psychopathy psychosis senselessness unbalance
WEAK
preposterousness unreasonableness witlessness
Antonyms
STRONG
balance certainty fact reality truth
WEAK
sanity soundness wellness

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s positively demented, but it’s not insanity for insanity’s sake.

From Salon • Apr. 5, 2026

An IT specialist working for MI5 on a contract who disclosed intelligence information to a "foreign power" has been found "not guilty by reason of insanity" by an Old Bailey jury.

From BBC • Mar. 20, 2026

That flying blob of insanity isn’t for everyone.

From The Wall Street Journal • Feb. 16, 2026

“I don’t get where all this insanity is coming from.”

From MarketWatch • Feb. 3, 2026

If that wasn't the definition of insanity, I didn't know what was.

From "Americanized" by Sara Saedi

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.