dehydration

noun

de·​hy·​dra·​tion ˌdē-ˌhī-ˈdrā-shən How to pronounce dehydration (audio)
Synonyms of dehydrationnext
: the process of dehydrating
especially : an abnormal depletion of body fluids

Examples of dehydration 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.
As with any outdoor activity in New Mexico, prepare for a harsh sun, alternately scorching heat or freezing cold depending on the season–this is desert–and potential dehydration. Chadd Scott, Forbes.com, 13 June 2026 Hyaluronic acid supplements are an emerging category, but both experts agree that the topical approach is the most direct and reliable way to combat dehydration. Ellie Davis, Vogue, 11 June 2026 He was found on Thursday morning, crawling towards Base Camp, and airlifted to Kathmandu, where doctors are treating him for frostbite, severe dehydration and a fractured thigh bone. CBS News, 10 June 2026 Such diets can increase the risk of nutrient deficiencies, fatigue, dehydration, digestive problems, and loss of muscle mass. Encyclopedia Britannica, 10 June 2026 See All Example Sentences for dehydration

Word History

First Known Use

1840, in the meaning defined above

Time Traveler
The first known use of dehydration was in 1840

Browse Nearby Words

Cite this Entry

“Dehydration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dehydration. Accessed 17 Jun. 2026.

Medical Definition

dehydration

noun
de·​hy·​dra·​tion ˌdē-hī-ˈdrā-shən How to pronounce dehydration (audio)
: the process of dehydrating
especially : an abnormal depletion of body fluids
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