Dictionary

idée fixe

noun \(ˌ)ē-ˌdā-ˈfēks\
plural idées fixes \same\

Definition of IDÉE FIXE

:  an idea that dominates one's mind especially for a prolonged period :  obsession

Examples of IDÉE FIXE

  1. <had this bizarre idée fixe that people were spying on her with electromagnetic waves>

Origin of IDÉE FIXE

French, literally, fixed idea
First Known Use: 1836

idée fixe

noun \(ˌ)ē-ˌdā-ˈfēks\   (Medical Dictionary)
plural idées fixes \-ˈfēks(-əz)\

Medical Definition of IDÉE FIXE

:  a usually delusional idea that dominates the whole mental life during a prolonged period (as in certain mental disorders)—called also fixed idea

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