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

That's particularly true in hospitals where nurses have been known to collapse from heat exhaustion, according to the Royal College of Nursing. — ABC News, 13 Aug. 2026

The hiker, who was suffering from severe dehydration and heat exhaustion, was far up the mountain, a social media post from the Pulaski County Government says. — Arkansas Online, 12 Aug. 2026

If the person is suffering from heat exhaustion, try to give them sips of cool water. — Jonathan Myers, CBS News, 12 Aug. 2026

Signs of heat exhaustion are excessive sweating, cool/clammy skin, dizziness, headache, nausea. — Oc Register, 11 Aug. 2026

Word History

First Known Use

1861, in the meaning defined above

Rhymes for heat exhaustion

• faustian

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