plural mismatches
: a faulty or unsuitable match
New England plays St. Louis in Super Bowl XXXVI this evening, and on the face of it, this game is a mismatch, a blowout waiting to happen.—William C. Rhoden
She is blood type O, and the donor heart and lungs she received in the first operation were blood type A. That mismatch triggered rejection by her immune system.—Dan Vergano
mismatched; mismatching

transitive verb

: to match (two people or things) wrongly or unsuitably
Let's say that you are afraid of boring your audience. One cause is mismatching the audience's need and the level of detail you provide.—Liz Reyer

Examples of mismatch in a Sentence

Recent Examples on the Web
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.
Noun
Instead of treating the mismatch as resistance, notice what each person is protecting. — Tarot.com, The Orlando Sentinel, 23 Sep. 2026 Naturalized citizens, married women with name changes, and older voters whose documents may have been lost must not get caught up in database mismatches. — Peggy Gossett-Seidman, Sun Sentinel, 23 Sep. 2026
Verb
Detailing doesn’t stop there, though, as the Swoosh, mustache and additional branding are mismatched across each pair. — Ian Servantes, Footwear News, 25 Sep. 2026 Match the setup to the actual disruption, whether that’s snoring, temperature clash, mismatched schedules or none of the above, and ignore the urge to simply go with what’s trendy this month. — Lauren Schuster, Sacbee.com, 18 Sep. 2026 See All Example Sentences for mismatch

Word History

First Known Use

Noun

1606, in the meaning defined above

Verb

1582, in the meaning defined above

Time Traveler
The first known use of mismatch was in 1582

Browse Nearby Words

Cite this Entry

“Mismatch.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mismatch. Accessed 26 Sep. 2026.

Kids Definition

mismatch

verb
mis·​match
(ˈ)mis-ˈmach
: to match unsuitably or badly
mismatch noun
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