Thesaurus.com
Dictionary.com
Showing results for delusion. Search instead for delousin.
Definitions

delusion

[dih-loo-zhuhn] / dɪˈlu ʒən /
NOUN
misconception, misbelief
Synonyms
STRONGEST
deception fantasy hallucination illusion pipe dream
STRONG
apparition blunder casuistry chicanery daydream deceptiveness dream error fallacy fancy figment ghost lapse mirage misapprehension mistake oversight phantasm phantom self-deception shade speciousness spuriousness trickery trip vision
WEAK
eidolon false impression fool's paradise head trip ignis fatuus optical illusion
Antonyms
STRONGEST
fact reality truth
STRONG
accuracy actuality being certainty correction fix honesty right success
WEAK
surety

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.

It unofficially formed in a Reddit chatroom last June for users who’ve experienced “spiraling” from A.I. delusion themselves or who’ve tried to help friends and family out.

From Slate • Feb. 2, 2026

A U.K. police chief is under fire after admitting a delusion from Microsoft Copilot produced incorrect evidence.

From MarketWatch • Jan. 14, 2026

"I have gotten to where I am today because of delusional optimism. It's delusion until it's not. It's got me to where I am today."

From Barron's • Dec. 17, 2025

I could no longer perpetuate a cycle of delusion, waiting for our right time to come.

From Los Angeles Times • Nov. 28, 2025

The delusion was deeper, in the core of my mind, which invented in the very moment of occurrence, then recorded the fiction.

From "Educated" by Tara Westover