✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

dehydration

noun

de·​hy·​dra·​tion ˌdē-ˌhī-ˈdrā-shən How to pronounce dehydration (audio)
: 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.
This process involves a series of chemical reactions, often including dehydration (to convert ethanol to ethylene), oligomerization (to build longer hydrocarbon chains), and hydrogenation/hydrotreating (to saturate the molecules and refine them into kerosene-range fuel). Mrigakshi Dixit, Interesting Engineering, 28 Nov. 2025 Research indicates that a reduced carbohydrate intake may lead to electrolyte loss and, in some cases, dehydration. Brittany Lubeck, Verywell Health, 28 Nov. 2025 Water Staying hydrated is equally important, as dehydration can worsen constipation—a frequent issue for GLP-1 users. Kristen Fischer, Health, 25 Nov. 2025 Anyone infected is at risk of experiencing dehydration, dry mouth and throat and feeling dizzy. Dejanay Booth-Singleton, CBS News, 19 Nov. 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 2 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
Love words? Need even more definitions?

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