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delude

American  
[dih-lood] / dɪˈlud /

verb (used with object)

deludes, present (3rd person singular) deluded, past participle, past deluding present participle
  1. to mislead the mind or judgment of; deceive.

    His conceit deluded him into believing he was important.

    Synonyms:
    gull, defraud, cheat, dupe, cozen, beguile
  2. Obsolete. to mock or frustrate the hopes or aims of.

  3. Obsolete. to elude; evade.


delude British  
/ dɪˈluːd /

verb

  1. to deceive the mind or judgment of; mislead; beguile

  2. rare to frustrate (hopes, expectations, etc)

"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

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Etymology

Origin of delude

First recorded in 1400–50; late Middle English deluden, from Latin dēlūdere “to play false,” equivalent to dē- de- + lūdere “to play”

Explanation

To delude is to trick or fool, often in relation to yourself. If you delude yourself into thinking your mom's chocolate cake is low in fat, you'll be disappointed to find out it's made with two sticks of butter! If you delude someone into thinking something, you are making a fool of them, or making them foolish. The word shares a root with ludicrous which means completely ridiculous. The thing that you foolishly believe is a delusion. Someone with delusions of grandeur has deluded themselves into thinking they are very, very special.

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Vocabulary lists containing delude

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.

“We can delude ourselves for a while that this is not a real cost, but we’re only fooling ourselves at the end of the day,” he says.

From The Wall Street Journal • Feb. 23, 2026

If I ever delude myself that I’ve become an “expert” at writing, it might be time for the urn.

From Salon • Apr. 5, 2024

“Let’s not delude ourselves, Mr. Diab will never be extradited from Canada,” he said.

From New York Times • Apr. 21, 2023

“They delude themselves with groupthink so that they can pretend this isn’t about hate but about protection, but we know the truth.”

From Seattle Times • Apr. 7, 2023

Because I wasn’t foolish enough to delude myself for this long—I was absolutely, totally, and completely falling for Sahil Roy.

From "From Twinkle, with Love" by Sandhya Menon

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