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.
Drink lots of water and other non-caffeinated, non-alcoholic drinks to prevent dehydration. Evan Moore, Charlotte Observer, 5 Feb. 2026 The dog was transported to APAWS Emergency Veterinary Hospital for treatment for hypothermia, dehydration, and severe emaciation, DPD said in the post. Jalen Williams, Freep.com, 5 Feb. 2026 Illnesses like the flu can also lead to dehydration, triggering headaches and other symptoms. Jillian Kubala, Health, 5 Feb. 2026 Measles commonly causes high fever, sensitivity to light (photophobia), dehydration, cough, pneumonia (about 1 in 20 cases) and a widespread rash. Doris Alvarez Cea, Florida Times-Union, 4 Feb. 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 9 Feb. 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
Last Updated: - Updated example sentences
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