| NOUN | state | folie a deux | the simultaneous occurrence of symptoms of a mental disorder (as delusions) in two persons who are closely related (as siblings or man and wife) |
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| Meaning | The simultaneous occurrence of symptoms of a mental disorder (as delusions) in two persons who are closely related (as siblings or man and wife). | |
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| Broader | mental disorder, mental disturbance, disturbance, psychological disorder, folie | (psychiatry) a psychological disorder of thought or emotion |