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

Definition of overheat

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

These functions keep the engine from overheating or freezing when driving in extreme climates. Zachary Palmer, Popular Mechanics, "Choosing the Right Coolant for Your Car," 4 Sep. 2018 But overheating and sweating can make some skin conditions worse. Jessica Cruel, SELF, "6 Ways Working Out Affects Your Skin," 27 July 2018 According to Bloomberg’s sources, however, Apple has been quietly working on a variety of problems, including ensuring the charger doesn’t overheat and allowing users to place their devices anywhere on the AirPower and still charge them. Don Reisinger, Fortune, "What Happened to Apple's AirPower Wireless Charger?," 21 June 2018 Equipped with built-in charging intelligence to prevent devices from overheating or short-circuiting, this simple stand will maximize your device's battery at optimal speed. Indianapolis Star, "Qi Wireless Fast Charging Pad," 19 Feb. 2018 Combined with warm surrounding temperatures, this can lead to overheating. Billy Perrigo, Time, "6 Easy Ways to Keep Your Phone Safe in the Summer Heat," 22 June 2018 The company’s decline was exacerbated by a 2016 global recall of Galaxy Note 7 devices with overheating batteries that tarnished its brand. Timothy W. Martin, WSJ, "Apple Beware: Samsung’s Great Fall in China Was Swift," 4 Jan. 2019 Coinmining can slow down devices, overheat batteries, and in some cases, render devices unusable. Bloomberg.com, "Sweden Is Becoming a Haven for Cryptojackers," 23 Mar. 2018 In mid-December, officials were counting on growth slowing to around 2.3% this year from 3% last year to prevent that overheating. Eric Morath, WSJ, "Fed Faces a Fresh Test: Engineering a Soft Economic Landing," 6 Jan. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'overheat.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of overheat

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

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Statistics for overheat

Last Updated

12 Apr 2019

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Time Traveler for overheat

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

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English Language Learners Definition of overheat

: to become too hot
: to cause (something) to become too hot


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

Kids Definition of overheat

: to heat too much : become too hot The engine overheated.

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More from Merriam-Webster on overheat

Rhyming Dictionary: Words that rhyme with overheat

Spanish Central: Translation of overheat

Nglish: Translation of overheat for Spanish Speakers

Britannica English: Translation of overheat for Arabic Speakers

Comments on overheat

What made you want to look up overheat? Please tell us where you read or heard it (including the quote, if possible).


an act or instance of returning to life

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