folie à deux
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English
[edit]Alternative forms
[edit]- folie a deux (without diacritics)
- folly à deux, folly a deux (rare)
Etymology
[edit]Borrowed from French folie à deux (“madness for/of two [people]”).
Pronunciation
[edit]Noun
[edit]folie à deux (plural folies à deux)
- A situation in which two people behave abnormally together in a way that neither of them would on their own.
- (psychiatry, strictly) A rare syndrome in which a symptom of psychosis (particularly a paranoid or delusional belief) is transmitted from one person to another.