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Definitions

insanity

[in-san-i-tee] / ɪnˈsæn ɪ ti /


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.

Barabak: A popular expression — which Steyer mentioned — defines insanity as doing the same thing over and over and expecting a different result.

From Los Angeles Times • May 15, 2026

“I have worked extensively with issues of competency, insanity and mentally disordered offenders, requiring close collaboration with medical experts and careful application of nuanced legal standards,” he said in an email.

From Los Angeles Times • May 1, 2026

Companies can spark temporary insanity by just saying some magic words.

From The Wall Street Journal • Apr. 16, 2026

She was reportedly found not responsible by reason of insanity.

From BBC • Apr. 15, 2026

‘You’re a mania', Jason decided, the word coming to him from his studies at Camp Jupiter long ago. ‘A spirit of insanity.

From "Blood of Olympus" by Rick Riordan




Vocabulary lists containing insanity


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