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

The weed wacker’s exhaust manifolds probably overheated, officials said, and set off the blaze. Joseph Serna, latimes.com, "Evacuation orders lifted as firefighters control Beverly Crest brush fire, caused by weed wacker," 13 June 2018 Sweating cools your skin and helps to keep you from overheating, according to the American Academy of Dermatology (AAD). Korin Miller, SELF, "What to Do if You’re Extremely Sweaty in the General Vicinity of Your Vagina," 3 Apr. 2019 Casper’s new Wave mattress comes with a steep price tag, but its ergonomic technology and humidity-fighting wool cover, which target discomfort and overheating, respectively, may just be the most game-changing gift of all. Zoe Ruffner, Vogue, "The 11 Best Gifts for the Wellness Warrior in Your Life," 14 Nov. 2018 The announcement comes after Apple’s first-party AirPower charging pad failed to launch amid reports that the device continues to be plagued by issues such as overheating, despite being namechecked in the iPhone XS manual. Jon Porter, The Verge, "Belkin’s Boostup wireless dock can charge three Apple devices at once," 24 Sep. 2018 Without air conditioning, homes can overheat, putting people at higher risk of heat stroke, where the body’s internal temperature reaches 104°F or higher. Umair Irfan, Vox, "The disturbing reason heat waves can kill people in cooler climates," 23 July 2018 According to UC Health, children can overheat four times faster than adults because the body has not yet developed a cooling process that involves the evaporation of sweat. Shelby Dermer, Cincinnati.com, "Parents and athletes: How to spot and treat heat-related illnesses this summer," 3 July 2018 Years of irresponsible policies have overheated the Turkish economy. Ishaan Tharoor, Washington Post, "The quest to defeat Erdogan," 19 June 2018 The Fed’s interest-rate increases earlier this year balanced this uncertainty in a reasonable way, keeping monetary conditions stimulative while taking care not to overheat. Jason Furman, WSJ, "The Case for Pausing the Interest-Rate Climb," 27 Nov. 2018

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

7 Jun 2019

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Time Traveler for overheat

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

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More Definitions for overheat



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

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