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lunacy
lunacy Lunacy is a historical term for insanity, originally tied to the old belief that madness could come and go with the phases of the moon.
Lunacy is a historical term for insanity, originally tied to the old belief that madness could come and go with the phases of the moon. In legal and institutional usage, it referred broadly to a person considered insane, often with special attention to whether the person could manage their own affairs.