de·​hy·​dra·​tion ˌdē-ˌhī-ˈdrā-shən How to pronounce dehydration (audio)
: the process of dehydrating
especially : an abnormal depletion of body fluids

Example Sentences

Recent Examples on the Web The medical professional reportedly told Robinson's friends that the 25-year-old was suffering dehydration and needed to be taken to the hospital, according to Mexican authorities. Fox News, 24 Nov. 2022 Include lots of salty ones, since that helps your body retain water and ward off dehydration. Matt Jancer, WIRED, 19 Nov. 2022 Olaplex can handle all your breakage and dehydration caused by bleach or hot tools. Tatjana Freund, ELLE, 19 Nov. 2022 Another potential complication in babies, particularly those 6 months and under, is trouble nursing or bottle-feeding when they are congested, resulting in dehydration. Sumathi Reddy, WSJ, 18 Nov. 2022 Pregnancy often causes nausea, but a small percentage of patients experience extreme sickness, vomiting, weight loss and dehydration. Sarah Swetlik |, al, 17 Nov. 2022 Studies show that even mild dehydration decreases concentration, alertness and short-term memory in children through adults. Alyssa Jung, Good Housekeeping, 14 Nov. 2022 But even relatively lower levels of heat stress can cause severe problems over time, especially if accompanied by chronic dehydration. Time, 3 Nov. 2022 Untreated, the disease, which is commonly spread through contaminated water, can cause death by dehydration in as little as one day, as the body tries to expel a virulent bacteria in gushes of vomit and watery diarrhea. Stephanie Nolen, New York Times, 31 Oct. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dehydration.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1854, in the meaning defined above

Time Traveler
The first known use of dehydration was in 1854

Dictionary Entries Near dehydration

Cite this Entry

“Dehydration.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2022.

Medical Definition



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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