noun
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the mental disorder characterised by having apparent perception of sights that are not actually present or being inspired by false conceptions or fancy imaginations.
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the state of being mad; madness; insanity.
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the state of being driven by infatuating love or shallow or foolish affection.
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folly; absurdity; foolishness; stupidity.
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the supposed state of the disembodied spirit of a dead person, wandering during night time and haunting living beings.