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.
Jet lag, dehydration, stress, and even slight disruptions to a regular meal schedule can result in unpleasant bathroom difficulties. Andrew Paul, Popular Science, 9 Apr. 2026 The University of Connecticut student, who had been studying dentistry to follow in his parents’ footsteps, died at Bridgeport Hospital Milford Campus in August 2024 after being diagnosed with pancreatitis, dehydration, metabolic acidosis and alcohol withdrawal. Jen Christensen, CNN Money, 9 Apr. 2026 When his condition worsened, he was admitted to the hospital ICU and diagnosed with pancreatitis, dehydration, metabolic acidosis, and alcohol withdrawal, per a medical analysis cited in the suit. Frank Landymore, Futurism, 8 Apr. 2026 Factors like dehydration, stress, oil production, and screen time often explain why people look more tired or oily by the afternoon. Allison Forsyth, Health, 8 Apr. 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 13 Apr. 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster