as in unreasonable
not using or following good reasoning
it's irrational to think that you can continue to consume an excess of calories and not gain weight
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Recent Examples of irrational
The study, published on the research platform arXiv, found that once the models were allowed to vary their bets and set their own targets, irrational behavior surged — and bankruptcy became a common outcome.
—
Jesus Mesa, MSNBC Newsweek, 22 Oct. 2025
Poetry brings hope, not an irrational optimism or wishful thinking, but a positive orientation to the future, of what a better, healthier future would look like.
—K.j.s. “sunny” Anand, Time, 15 Oct. 2025
Marks believes that investor optimism doesn’t automatically signal irrational exuberance.
—Yun Li, CNBC, 13 Oct. 2025
That irrational choice, born of struggle and longing, changed my life.
—Sudhir Gupta, Rolling Stone, 7 Oct. 2025
See All Example Sentences for irrational
Jesus Mesa, MSNBC Newsweek, 22 Oct. 2025
Poetry brings hope, not an irrational optimism or wishful thinking, but a positive orientation to the future, of what a better, healthier future would look like.
—K.j.s. “sunny” Anand, Time, 15 Oct. 2025
Marks believes that investor optimism doesn’t automatically signal irrational exuberance.
—Yun Li, CNBC, 13 Oct. 2025
That irrational choice, born of struggle and longing, changed my life.
—Sudhir Gupta, Rolling Stone, 7 Oct. 2025
See All Example Sentences for irrational
Recent Examples of Synonyms for irrational
Adjective
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Officers are able to use loitering laws as general warrants to circumvent individuals’ constitutional right to be protected from unreasonable searches and seizures, Wood said.—
Alex Brizee,
Idaho Statesman,
10 Nov. 2025
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The class counsel has argued that objectors are raising either points that were already decided, inappropriate for this forum, or unreasonable to address.—
Daniel Libit,
Sportico.com,
5 Nov. 2025
Adjective
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Let sound political prescience but take the place of an unreasoning prejudice, and this will be done.—
Frederick Douglass,
The Atlantic,
16 Aug. 2017
Adjective
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But here, stranded alongside Bradley Cooper (who has the same deer-in-headlights look), she’s completely lost as a Depression-era woman who goes mad after losing a child and directs her fury at a woman who had an illegitimate son with her husband years earlier.—
Tim Grierson,
Vulture,
8 Nov. 2025
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This dynamic marred the 2012-13 Hurricane Sandy package and has recurred in other disaster bills, not because relief is illegitimate but because speed plus political cover invites provisions that would die in regular order.—
Veronique De Rugy,
Oc Register,
7 Nov. 2025
Cite this Entry
“Irrational.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/irrational. Accessed 13 Nov. 2025.
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