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
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of irrational
After all, mathematicians have long known that most numbers are irrational.
—
Erica Klarreich, Quanta Magazine, 8 Jan. 2025
And then there are the more irrational concerns: what if the baby comes out and doesn’t like me?
—Daisy Jones, Vogue, 23 Dec. 2024
There were some generational differences in regard to the reasons driving irrational purchases.
—Arthur Zaczkiewicz, WWD, 27 Jan. 2025
The author suggests that large crowds can be made irrational, often due to charismatic leadership, and shows how most people choose to go with the grain.
Group decisions can also reduce a sense of personal accountability as people find solidarity in what the masses want.
—Mark Travers, Forbes, 20 Jan. 2025
See All Example Sentences for irrational
Erica Klarreich, Quanta Magazine, 8 Jan. 2025
And then there are the more irrational concerns: what if the baby comes out and doesn’t like me?
—Daisy Jones, Vogue, 23 Dec. 2024
There were some generational differences in regard to the reasons driving irrational purchases.
—Arthur Zaczkiewicz, WWD, 27 Jan. 2025
The author suggests that large crowds can be made irrational, often due to charismatic leadership, and shows how most people choose to go with the grain.
Group decisions can also reduce a sense of personal accountability as people find solidarity in what the masses want.
—Mark Travers, Forbes, 20 Jan. 2025
See All Example Sentences for irrational
Cite this Entry
“Irrational.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/irrational. Accessed 4 Mar. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share