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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Example Sentences
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Recent Examples of irrational
The book is Labarge’s attempt to tell the story of what happened to her and her family without sanitizing what happened, which requires her (and the reader) to sit with thoughts that are sometimes incoherent and irrational.
—
Literary Hub,
11 June 2026
The American origin story is rooted in the notion that George III was its vanquished villain, an irrational tyrant who oppressed the American colonists.
—
ABC News,
3 June 2026
This would be equivalent to a vague text message spiraling out of control or an irrational fear.
—
Valerie Mesa,
PEOPLE,
3 June 2026
Carpenter says the disturbing encounters left her fearful for her safety and that of relatives living with her, as police label the suspect’s fixation irrational and increasingly dangerous.
—
Emily St. Martin,
Los Angeles Times,
2 June 2026
See All Example Sentences for irrational
Literary Hub,
11 June 2026
The American origin story is rooted in the notion that George III was its vanquished villain, an irrational tyrant who oppressed the American colonists.
—
ABC News,
3 June 2026
This would be equivalent to a vague text message spiraling out of control or an irrational fear.
—
Valerie Mesa,
PEOPLE,
3 June 2026
Carpenter says the disturbing encounters left her fearful for her safety and that of relatives living with her, as police label the suspect’s fixation irrational and increasingly dangerous.
—
Emily St. Martin,
Los Angeles Times,
2 June 2026
See All Example Sentences for irrational
Recent Examples of Synonyms for irrational
Adjective
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According to the Aspen Institute, Norwegian leagues don’t keep score or track standings until the kids are 11 years old, which goes a long way toward eliminating many of the unreasonable pressures that developing athletes often experience in more hyper-competitive environments.
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Luca thinks Marcus is being unreasonable by adding a new ingredient to their dessert at the last minute and by asking Chester to run an errand in awful conditions.
Adjective
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Roosevelt surely understood that nameless, unreasoning, unjustified fear cannot be eradicated.
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Bainbridge knew about secrets and unreasoning shame.
Adjective
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That difference suggests that the government sees this extension of patent rights as an illegitimate way for a company to exclude other companies from competing.
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Some fraudsters run an illegitimate DME company and get a doctor to prescribe the equipment.
Cite this Entry
“Irrational.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/irrational. Accessed 29 Jun. 2026.
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