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Synonyms

fixed idea

American  

noun

  1. a persistent or obsessing idea, often delusional, that can, in extreme form, be a symptom of psychosis.


fixed idea British  

noun

  1. Also: idée fixe.  an idea, esp one of an obsessional nature, that is persistently maintained and not subject to change

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of fixed idea

First recorded in 1820–30

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Vallejo also dedicated three summers to the caddie program, getting up early, enduring the heat and carrying heavy bags, always with a fixed idea in mind.

From Los Angeles Times May 28, 2025

Getting a new view on someone I had such a fixed idea of who or want he was, and this is a way of understanding that.

From Salon Jul. 6, 2023

But “love of my life” is a fixed idea, and people are fluid, updating themselves over time.

From Washington Post Jan. 10, 2023

“This is my attempt to make sense of the period … weeks and then months that cut loose any fixed idea I had ever had about death, about illness … about the shallowness of sanity.”

From Slate Jul. 11, 2018

R. M. Renfield, ætat 59.—Sanguine temperament; great physical strength; morbidly excitable; periods of gloom, ending in some fixed idea which I cannot make out.

From "Dracula" by Bram Stoker

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