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 an example, a diabetic that cannot get access to insulin could suffer from diabetic ketoacidosis, a life-threatening condition that occurs when the body does not have access to enough insulin, leading to severe dehydration, coma and even death. Omer Awan, Forbes.com, 27 June 2026 With each passing hour, survival odds diminish sharply due to dehydration, crush injuries, internal bleeding and lack of oxygen, though in rare cases survivors can endure for days. Antonio María Delgado, Miami Herald, 27 June 2026 Athletes experience cramps for different reasons, such as dehydration, fatigue, or lack of carbohydrates. Chantelle Lee, Time, 26 June 2026 Most patients present with fever, profound fatigue, vomiting, diarrhea, and abdominal pain, while severe illness is driven by dehydration, shock, immune dysregulation, and multiorgan dysfunction rather than catastrophic hemorrhage. Krutika Kuppalli, STAT, 26 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 2 Jul. 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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