dehydrate

verb

de·​hy·​drate (ˌ)dē-ˈhī-ˌdrāt How to pronounce dehydrate (audio)
dehydrated; dehydrating; dehydrates

transitive verb

1
a
: to remove bound water or hydrogen and oxygen from (a chemical compound) in the proportion in which they form water
b
: to remove water from (something, such as a food)
2
: to deprive of vitality or savor

intransitive verb

: to lose water or body fluids
dehydrator noun

Did you know?

Dehydrating food is a good way to preserve it; raisins, which are dehydrated grapes, are a good example. Dehydration through industrial processes makes it possible to keep food even longer and store it in a smaller space. Freeze-drying produces food that only needs rehydration—that is, the addition of water—to restore its original consistency. Runners, cyclists, and hikers fearful of dehydration seem to be constantly hydrating themselves nowadays, sometimes even using a shoulder pack with a tube going straight into the mouth. Dehydrate can also be used for making something "dry" or "lifeless;" thus, a dull teacher can dehydrate American history, and an unimaginative staging can dehydrate a great Shakespeare play.

Examples of dehydrate in a Sentence

Salt dehydrates the meat and keeps it from spoiling. Athletes drink lots of water so they don't dehydrate. Exercising in this heat will dehydrate you.
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.
Alcohol-based, scented formulations can also dehydrate and irritate skin. Bianca Salonga, Forbes, 18 Feb. 2025 Maranda survived but the 23-month-old was dehydrated, full of insect bites and covered in her mother's blood. Fernando Cervantes Jr., USA TODAY, 14 Feb. 2025 Fever or illness, or being dehydrated, can trigger sleep disturbances. Arielle Tschinkel, Parents, 12 Feb. 2025 But the reason that your oily skin still feels tight when it’s dehydrated? Jenna Ryu, SELF, 11 Feb. 2025 See All Example Sentences for dehydrate

Word History

First Known Use

1876, in the meaning defined at transitive sense 1a

Time Traveler
The first known use of dehydrate was in 1876

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Cite this Entry

“Dehydrate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dehydrate. Accessed 9 Mar. 2025.

Kids Definition

dehydrate

verb
de·​hy·​drate (ˈ)dē-ˈhī-ˌdrāt How to pronounce dehydrate (audio)
1
: to remove water from (as foods)
2
: to lose water or body fluids
dehydration
ˌdē-ˌhī-ˈdrā-shən
noun

Medical Definition

dehydrate

verb
de·​hy·​drate (ˈ)dē-ˈhī-ˌdrāt How to pronounce dehydrate (audio)
dehydrated; dehydrating

transitive verb

1
: to remove bound water or hydrogen and oxygen from (a chemical compound) in the proportion in which they form water
2
: to remove water from (as foods)

intransitive verb

: to lose water or body fluids
dehydrator noun

More from Merriam-Webster on dehydrate

Last Updated: - Updated example sentences
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