fixed idea(redirected from overvalued idea)
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an idea, esp one of an obsessional nature, that is persistently maintained and not subject to change. Also: idée fixe
i•dée fixe(i deɪ ˈfiks)
pl. i•dées fixes (i deɪ ˈfiks)
a persistent or obsessing idea, often delusional, that in extreme form can be a symptom of psychosis. Also called fixed idea.