what is insanity in psychology
insanity. n, pl-ties. 1. (Psychology) relatively permanent disorder of the mind; state or condition of being insane. 2. (Law) law a defect of reason as a result of mental illness, such that a defendant does not know what he or she is doing or that it is wrong.3. utter folly; stupidity.oanthropy. a form of insanity or mental disorder in which the sufferer imagines that he is an animal. â zoanthropic, adj. zoopsia. a form of hallucination in which the sufferer imagines he sees animals.