under the illusion
idiom
: having a mistaken belief about something
He was under the illusion that he was a good player.
Examples of under the illusion in a Sentence
Recent Examples on the Web
Many defer their planning, under the illusion of having more time or viewing the rewards of preparation as a distant concern not worth prioritizing today.
—
Harsh Patel, Forbes.com, 22 Aug. 2025
Anyone still laboring under the illusion that this is a populist administration needs to understand that ‘for the people’ means ‘only some of the people,’ usually the millionaires and billionaires.
—Tom Zirpoli, Baltimore Sun, 8 July 2025
For decades, leadership operated under the illusion that the world moved in straight lines.
—Kevin Kruse, Forbes, 3 Mar. 2025
At this point, no one is under the illusion that this is going to be a fun night.
—Bill Wyman, Vulture, 28 Feb. 2025
Compulsive bettors often operate under the illusion of control, thinking that in sports betting, compared to a game of chance like slot machines, their expertise will give them an upper hand.
—Stephen J. Nesbitt, The Athletic, 17 Apr. 2024
But many voters who are sitting out or voting third party aren’t under the illusion that Trump is in any way a better alternative for Palestinians.
—Abdallah Fayyad, Vox, 7 Dec. 2018
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Harsh Patel, Forbes.com, 22 Aug. 2025
Anyone still laboring under the illusion that this is a populist administration needs to understand that ‘for the people’ means ‘only some of the people,’ usually the millionaires and billionaires.
—Tom Zirpoli, Baltimore Sun, 8 July 2025
For decades, leadership operated under the illusion that the world moved in straight lines.
—Kevin Kruse, Forbes, 3 Mar. 2025
At this point, no one is under the illusion that this is going to be a fun night.
—Bill Wyman, Vulture, 28 Feb. 2025
Compulsive bettors often operate under the illusion of control, thinking that in sports betting, compared to a game of chance like slot machines, their expertise will give them an upper hand.
—Stephen J. Nesbitt, The Athletic, 17 Apr. 2024
But many voters who are sitting out or voting third party aren’t under the illusion that Trump is in any way a better alternative for Palestinians.
—Abdallah Fayyad, Vox, 7 Dec. 2018
Cite this Entry
“Under the illusion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/under%20the%20illusion. Accessed 15 Sep. 2025.
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