Dictionary.com
definitions
  • synonyms

folie à deux

[fo-lee uh doo; French faw-lee a dœ]
noun, plural fo·lies à deux [fo-leez uh doo; French faw-lee za dœ] /fɒˈliz ə ˈdu; French fɔ li za ˈdœ/. Psychiatry.
  1. the sharing of delusional ideas by two people who are closely associated.
Show More

Origin of folie à deux

Borrowed into English from French around 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for folie a deux

folie à deux

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

Word Origin for folie à deux

French: madness involving two (people)
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
folie a deux in Medicine

folie á deux

(fô-lē′ ä dœ′, fŏl′ē)
n.
  1. A condition in which symptoms of a mental disorder occur simultaneously in two individuals who share a close relationship or association.
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.