folie à deux
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.