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folie à deux

American  
[fo-lee uh doo, faw-lee a ] / fɒˈli ə ˈdu, fɔ li a ˈdœ /

noun

Psychiatry.
folies à deux plural
  1. the sharing of delusional ideas by two people who are closely associated.


folie à deux British  
/ ˈfɒlɪ æ ˈdɜː /

noun

  1. psychiatry mental illness occurring simultaneously in two intimately related persons who share some of the elements of the illness, such as delusions

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Inflected Forms

noun

Etymology

Origin of folie à deux

Borrowed into English from French around 1890–95

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It deals with the shared life — call it madness, if you will — of a husband and a wife, and the times when their folie à deux edges into public view.

From New York Times • Apr. 16, 2020

In psychiatry there is a condition known as folie à deux, which describes how two people share a psychosis.

From Salon • Jun. 21, 2019

She writes about folie à deux and mass hysteria, doppelgängers, sociopathy, revenge.

From The New Yorker • Jun. 21, 2016

It’s telling how often the image of insanity shows up in creative pairs; two people making their own reality resembles what psychiatrists call a folie à deux, “a madness shared by two.”

From Slate • Oct. 9, 2014

The results are extremely funny in the account of a folie à deux in the dangerous world of teaching, and perceptive in the observation of the creative process.

From The Guardian • Mar. 31, 2013

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