folie à deux

[ fo-leeuh-doo; French faw-leea-dœ ]

noun,plural fo·lies à deux [fo-leezuh-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.

Origin of folie à deux

1
Borrowed into English from French around 1890–95

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British Dictionary definitions for folie à deux

folie à deux

/ (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

Origin of folie à deux

1
French: madness involving two (people)

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