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folie à deux

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noun fo·lie à deux \fȯ-lē-ä-ˈdœ, ˌfä-lē-ˌä-ˈdə(r)\

Definition of folie à deux

  1. :  the presence of the same or similar delusional ideas in two persons closely associated with one another



Origin and Etymology of folie à deux

French, literally, double madness


First Known Use: circa 1892


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