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.
Experts say keeping up with fluids in colder months can help prevent fatigue and low energy since dehydration often goes unnoticed when people don’t feel as thirsty. Deirdre Bardolf, FOXNews.com, 20 Dec. 2025 According to the team, the soldiers at these sites could have become seriously ill from dehydration during summer Giardia outbreaks, which are often linked to contaminated water and can spread rapidly. Laura Baisas, Popular Science, 19 Dec. 2025 Even when dormant, warm-season grasses still require adequate soil moisture to prevent dehydration and maintain plant health. Kim Toscano, Southern Living, 18 Dec. 2025 ERs are meant to care for people experiencing possible medical emergencies, including difficulty breathing, chest pain and severe dehydration. Michelle Marchante, Miami Herald, 17 Dec. 2025 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 23 Dec. 2025.

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
Last Updated: - Updated example sentences
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