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 …

An oft-quoted bon mot (frequently attributed to Albert Einstein, Benjamin Franklin, or a number of other people who probably never said it) is that insanity may be defined as “doing the same thing over and …

INSANITY meaning: 1. a very stupid, unreasonable, or dangerous action or situation: 2. the condition of being very…. Learn more.

Contrary to popular belief, insanity isn't defined as doing the same thing over and over and expecting a different result. And, while it is often used to describe certain states of mind, insanity is also not a …

Insanity definition: (not in technical use as a medical diagnosis) the condition of being insane; a derangement of the mind.. See examples of INSANITY used in a sentence.

The condition of being insane; a state of mind that impedes the ability to think, reason, or behave in ways that are considered normal, esp. one caused by mental illness. Also in extended use.

Definition of insanity noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Oct 23, 2025 · Explore the definition of the word "insanity," as well as its versatile usage, synonyms, examples, etymology, and more.

Insanity is the state of being insane. The defence pleaded insanity, but the defendant was found guilty and sentenced.

a form of insanity or dementia praecox that can appear at puberty, characterized by foolish behavior and deterioration of the mental faculties.