folie à deux Hear it!

folie à deux definition

fo·lie à deux (fō̂ lē ȧ dö′)

Psychiatry a condition in which two closely associated people who are mentally ill share the same delusional beliefs

Etymology: Fr, lit., double insanity

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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