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
It's forged in the quiet, difficult moments when doing the right thing seems irrational.
—
Victoria Vitchenco, Forbes.com, 28 May 2025
Rejecting his challenge in February 2024, Britain’s High Court said the decision to change Harry’s security status was neither irrational nor procedurally unfair.
—Henry Austin, NBC news, 2 May 2025
After a 14-year break, the Final Destination franchise returns with another installment sure to inspire a host of new irrational fears.
—Ew Staff, EW.com, 16 May 2025
Free agency is in the distant past, the NFL Draft is in the rearview mirror and, barring any major swerves, many fans are piecing team depth charts together with irrational confidence while anxiously waiting for Wednesday’s schedule release.
—Dan Pompei, New York Times, 12 May 2025
See All Example Sentences for irrational
Victoria Vitchenco, Forbes.com, 28 May 2025
Rejecting his challenge in February 2024, Britain’s High Court said the decision to change Harry’s security status was neither irrational nor procedurally unfair.
—Henry Austin, NBC news, 2 May 2025
After a 14-year break, the Final Destination franchise returns with another installment sure to inspire a host of new irrational fears.
—Ew Staff, EW.com, 16 May 2025
Free agency is in the distant past, the NFL Draft is in the rearview mirror and, barring any major swerves, many fans are piecing team depth charts together with irrational confidence while anxiously waiting for Wednesday’s schedule release.
—Dan Pompei, New York Times, 12 May 2025
See All Example Sentences for irrational
Recent Examples of Synonyms for irrational
Adjective
-
The vast majority of post commenters assured the OP that her feelings are completely valid and that her mother is being unreasonable.—
Toria Sheffield,
People.com,
7 June 2025
-
But leading the team to the Finals is not an unreasonable request.—
Troy Renck,
Denver Post,
6 June 2025
Adjective
-
This secret-keeping tradition kept President François Mitterrand’s illegitimate daughter hidden for years.—
Saskya Vandoorne,
CNN Money,
27 May 2025
-
Maduro, whose reelection last year to a third term has been condemned internationally as illegitimate, also has cracked down on his political opponents.—
Mark Sherman,
Chicago Tribune,
19 May 2025
Cite this Entry
“Irrational.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/irrational. Accessed 19 Jun. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share