overheat

verb

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

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.
When the body can't cool itself by sweating, dehydration and overheating become more likely and heat stroke becomes a possibility, according to the Centers for Disease Control and Prevention. Dinah Voyles Pulver, USA Today, 3 July 2026 The facilities require near-constant cooling systems to keep systems from overheating. Charlotte Observer, 2 July 2026 Know the signs of heat illness Heat exhaustion is the first step toward heat stroke; it is caused by overheating and dehydration—specifically, the loss of salt and water through sweat. Claire Cameron, Scientific American, 2 July 2026 They’re also made, in part, with breathable mesh that keeps feet from overheating. Cheryl Wagemann, InStyle, 2 July 2026 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 5 Jul. 2026.

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