folie a deux folie • foliicolous · · · Info · Definitions · Characters · · folie a deux · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) the simultaneous occurrence of symptoms of a mental disorder (as delusions) in two persons who are closely related (as siblings or man and wife). Synonyms: folie a deux. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F u latin small letter u U+0075 x latin small letter x U+0078