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 In addition to rear seat occupant sensors and apps like Kars 4 Kids Safety that remind drivers to check the backseat, here are some other ways to prevent your child from overheating in a hot car: Keep a stuffed animal in your child’s car seat. Olivia Sanchez, USA TODAY, "Reports: 10-month-old girl in Virginia is 21st child to die inside a hot car this year," 16 July 2019 Without an annual haircut, llamas and alpacas are at risk for overheating in the summer, Hassrick says. Marygrace Taylor, Good Housekeeping, "6 Things You Should to Know Before Getting a Pet Llama or Alpaca," 23 July 2018 The incident also points out Carman’s seamanship as the engine overheating in April was caused by not opening a valve to provide water to cool the engine. Dave Altimari, courant.com, "Engine Fire on Nathan Carman's Boat Led to Coast Guard Rescue Five Months Before It Sank," 14 June 2018 The Earth is coming to the boiling point as the climate disaster of the Meteor strike becomes more and more clear, but the political situation is already overheated. David Canfield, EW.com, "The Relentless Moon: Get a first look at the otherworldly follow-up to The Calculating Stars," 5 Nov. 2019 If left to swim downstream by themselves, some of the sprats would get lost and overheated in the stagnant reservoirs behind each dam; despite screens, others would be ground up in the turbines. Patrick Symmes, Harper's magazine, "The $68,000 Fish," 28 Oct. 2019 Nine people died of overheating in a sweltering truck in Texas in 2017. The Economist, "The death of 39 people shows the human cost of hostile policies," 24 Oct. 2019 In particular, CalFire sees a good amount of fires on steep inclines, where tractor trailers and other heavy vehicles struggle, overheat, pull over, and set the brush on fire with their undercarriage. Wired, "This Clever Gel Works Like a Vaccine for Wildfires," 30 Sep. 2019 To ward off overheating, large animals such as elephants and rhinos had to evolve strategies to keep cool. John Pickrell, National Geographic, "New discovery shows how T. rex kept its brain cool," 4 Sep. 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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Time Traveler for overheat

Time Traveler

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

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Statistics for overheat

Last Updated

6 Dec 2019

Cite this Entry

“Overheat.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/overheat. Accessed 15 December 2019.

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More Definitions for overheat


How to pronounce overheat (audio)

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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