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Definitions

delusional

[dih-loo-zhuh-nl] / dɪˈlu ʒə nl /


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.

Even so, there is a curious — and hopefully not delusional — optimism in classical music, L.A. style.

From Los Angeles Times • Apr. 3, 2026

By August, as problems with users suffering from delusional psychosis appeared in media reports, OpenAI attempted to retire 4o entirely and replace it with a new version, named GPT-5.

From The Wall Street Journal • Feb. 10, 2026

While the “number of users” once meant “number of paying users,” the success of Facebook, Instagram and other social-media sites persuaded delusional investors that the word “paying” could be dropped.

From MarketWatch • Feb. 6, 2026

Girgis and his peers have tested ChatGPT and Claude for how they handle delusional or paranoid thoughts.

From Slate • Feb. 2, 2026

To Steve Eisman at FrontPoint Partners, the market seemed mainly stupid or delusional: A financial culture that had experienced so many tiny panics followed by robust booms saw any sell-off as merely another buying opportunity.

From "The Big Short" by Michael Lewis