overheat

verb

over·​heat ˌō-vər-ˈhēt How to pronounce overheat (audio)
overheated; overheating; overheats

transitive verb

1
: to heat to excess
2
: to stimulate or agitate unduly

intransitive verb

: to become heated beyond a safe or desirable point

Examples of overheat in a Sentence

I overheated the food in the microwave. Be careful not to overheat the engine.
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.
These storms can also damage key technological infrastructure, such as by interfering with the flow of electricity in the power grid and causing transformers to overheat and fail. JSTOR Daily, 24 Oct. 2025 If those systems fail—or simply run out of diesel—the plant would have no way to stop the nuclear fuel inside those reactors from overheating and potentially melting down. Simon Shuster, Time, 23 Oct. 2025 Always Effortless Classic-Fit Jacket Fall outfits aren’t complete without a lightweight jacket to keep you warm without overheating in the sun, and this jacket’s Glyde fabric is both waterproof and windproof to be your go-to no matter the weather. Caley Sturgill, Southern Living, 21 Oct. 2025 Thermal runaway, or self-heating, can occur without warning in lithium batteries as a result of various factors, including if the battery is damaged, overheated, exposed to water, overcharged or improperly packed, according to the Federal Aviation Administration. Toria Sheffield, PEOPLE, 19 Oct. 2025 See All Example Sentences for overheat

Word History

First Known Use

14th century, in the meaning defined at transitive sense 1

Time Traveler
The first known use of overheat was in the 14th century

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Cite this Entry

“Overheat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/overheat. Accessed 24 Oct. 2025.

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