folie à deux
fo·lie à deux
noun\fȯ-lē-ä-ˈdœ, ˌfä-lē-ˌä-ˈdə(r)\
Definition of FOLIE À DEUX
: the presence of the same or similar delusional ideas in two persons closely associated with one another
Origin of FOLIE À DEUX
French, literally, double madness
First Known Use: circa 1892
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