dehydrated; dehydrating; dehydrates
Synonyms of dehydratenext

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

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.
Most people wake mildly dehydrated after six to eight hours of sleep, dietitians and endocrinologists say. — Hanna Wickes, Kansas City Star, 15 Oct. 2026 Doctors say the way most people reach for that first cup, groggy, dehydrated and before food, works against the energy it is supposed to deliver. — Hanna Wickes, Charlotte Observer, 15 Oct. 2026 Jackie was brought into the bird rehabilitation center weak and dehydrated following an altercation with another eagle in July. — Laura Baisas, Popular Science, 15 Oct. 2026 And none of the many alternative remedies for treating lice – such as smothering them with mayonnaise or oil, dehydrating them with saline or hot air, or zapping them with an electronic comb – have proven to be effective. — Emily J. C. Wong, The Conversation, 14 Oct. 2026 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

Browse Nearby Words

Cite this Entry

“Dehydrate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dehydrate. Accessed 22 Oct. 2026.

Kids Definition

1
: to remove water from (as foods)
2
: to lose water or body fluids
dehydration
ˌdē-ˌhī-ˈdrā-shən
noun

Medical Definition

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
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