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Literally means "set idea" or "fixed idea" (from the French), pronounced: ee dày feeks

Fixation, obsession, an idea that remains fixed and unchanging in the mind and becomes an obsession
I really want to meet this girl again, it's my idée fixe

I have an obsession with money, to be a rich man is an idée fixe
by agent0007 August 12, 2009