Dictionary.com
Thesaurus.com

heat exhaustion

American  

noun

  1. a condition characterized by faintness, rapid pulse, nausea, profuse sweating, cool skin, and collapse, caused by prolonged exposure to heat accompanied by loss of adequate fluid and salt from the body.


heat exhaustion British  

noun

  1. Also called: heat prostration.  a condition resulting from exposure to intense heat, characterized by dizziness, abdominal cramp, and prostration Compare heatstroke

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of heat exhaustion

First recorded in 1935–40

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Several passengers were treated for heat exhaustion and difficulty breathing, ABC7 reported, citing fire officials.

From Los Angeles Times Jul. 19, 2026

This is a typical callout for the ambulance crew in South West England, who in one of Britain's longest-lasting heatwaves, are tending to cases from heat exhaustion to stroke patients.

From BBC Jul. 10, 2026

Paramedics meanwhile carted away a young woman suffering from apparent heat exhaustion.

From Barron's Jul. 3, 2026

During a heat wave, there are three conditions to watch out for: dehydration; heat exhaustion, which can be characterized by headaches and nausea; and the more serious heatstroke.

From MarketWatch Jun. 30, 2026

This is twenty-four days of heat, exhaustion, and monotony.

From "A Heart in a Body in the World" by Deb Caletti

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training