Longman Dictionary of Contemporary English
WordNet
n. a condition marked by dizziness and nausea and weakness caused by depletion of body fluids and electrolytes [syn: heat prostration, prostration]
Wikipedia
Heat exhaustion is a severe form of heat illness. It is a medical emergency. Heat exhaustion is caused by the loss of water and electrolytes through sweating.
Usage examples of "heat exhaustion".
He'd twisted an ankle in the fall, was suffering the beginnings of heat exhaustion, and was burned out with fatigue.
Everything was starting to make sense, in the heady, rushy way that came with heat exhaustion.
Brown stared at Chief Engineer City, who had trouble keeping his head up as he bravely fought to keep from blacking out from heat exhaustion.
The colonel had found it necessary to employ his reserve, for by the time Able Company reached the crest of the ridge, more than half its men were down, either from enemy fire or heat exhaustion, and by the time Baker Company got there, they had lost a fifth of their men, mostly to exhaustion, and what was left was put to work carrying the dead and wounded off the slopes of the ridge, with Charley Company now needed to protect them.
He was wandering half-mad from thirst and heat exhaustion, and was found and taken in by a tribe of people who looked like me.
Hollister sank back, utterly spent by heat exhaustion and maniacal fury at the realization of his defeat.
It would be mad to start walking for several hours, unless they wanted to lose more time still to heat exhaustion.
She did indeed seem to have suffered heat exhaustion, and he knew that something extremely compelling must have brought her out there in her good clothing, as she obviously hadn't been forced.