heat exhaustion

noun

: a condition marked by weakness, nausea, dizziness, and profuse sweating that results from physical exertion in a hot environment

called also heat prostration

compare heatstroke

Examples of heat exhaustion in a Sentence

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.
The musician previously postponed six shows in 2022 after collapsing on stage in Clarkson, Mich., also citing dehydration as well as heat exhaustion. EW.com, 23 Apr. 2025 Officials said the children died from severe malnutrition and one also suffered fatal heat exhaustion. Jennifer Rodriguez, Kansas City Star, 22 Apr. 2025 Kahne had to retire early due to issues with heat exhaustion and dehydration, but is set to run this race at the historic Rockingham Speedway. Nicholas Creel, MSNBC Newsweek, 19 Apr. 2025 Many of them suffered from heat stroke and heat exhaustion and there were no signs of water or working air conditioning in the truck, authorities said. Bart Jansen, USA TODAY, 19 Mar. 2025 See All Example Sentences for heat exhaustion

Word History

First Known Use

1861, in the meaning defined above

Time Traveler
The first known use of heat exhaustion was in 1861

Browse Nearby Words

Cite this Entry

“Heat exhaustion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20exhaustion. Accessed 2 May. 2025.

Kids Definition

heat exhaustion

noun
: a condition marked by weakness, nausea, dizziness, and much sweating that results from physical exertion in a hot environment

called also heat prostration

compare heat stroke

Medical Definition

heat exhaustion

noun
: a condition characterized by faintness or fainting, palpitations, nausea, vomiting, headache, and profuse sweating and resulting from physical exertion in a hot environment

called also heat prostration

compare heatstroke

More from Merriam-Webster on heat exhaustion

Last Updated: - Updated example sentences
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