folie
/ˈfoʊli/
noun
- A French word meaning 'madness' or 'foolishness,' used in English to refer to a delusion or irrational belief shared by two or more people (often in the phrase 'folie à deux').
- The couple's shared folie led them to believe they could communicate with aliens.
- In literature, folie often describes a character's descent into irrational behavior.
- The psychologist diagnosed the pair with a classic case of folie.