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.

John Carney directs a musical dramedy starring the actor and Nick Jonas in a story of ambition, delusion and betrayal.

From The Wall Street Journal • May 28, 2026

"Any delusion of full decoupling isn't realistic on any near-term horizon", she told AFP.

From Barron's • May 13, 2026

A practicing Mormon, Coppins had no previous experience with gambling but quickly learned how easily the “joyful naivete” of his initial use “could curdle into delusion and compulsion.”

From Slate • May 5, 2026

But Taka continued to slide into delusion and by June, had started to believe he could read minds.

From BBC • May 2, 2026

It was a measure of the confusion and delusion on Wall Street that Deutsche Bank didn’t care to run that risk.

From "The Big Short" by Michael Lewis

Vocabulary lists containing delusion

Night

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