: a compound formed by the union of water with some other substance
hydrated; hydrating
1
: to cause to take up or combine with water or the elements of water
2
: to supply with ample fluid or moisture
hydrates and softens the skin
: to become a hydrate
Examples of hydrate in a Sentence
Verb
lotions and creams that hydrate the skin
Drink fluids to hydrate the body.
Recent Examples on the Web
Lily Wohlner, Allure, 28 Mar. 2026
Banish dull, dry winter skin with this hydrating serum.
—Bestreviews, Mercury News, 27 Mar. 2026
The in-store assortment includes hair essences and hydrating mists from Narka; PDRN and exosome scalp serums from Lilyeve, plus other offerings from La’dor, Healing Bird, Refilled and Growus, which are all priced under $40 and focus on innovative formats and ingredients.
—Noor Lobad, Footwear News, 25 Mar. 2026
Amazon Spring Sale hair care deals Stock up on shampoo and conditioner during Amazon's Big Spring Sale as well, including 20% off the Native Coconut & Vanilla Shampoo and Conditioner, packed with hydrating hair ingredients including coconut oil.
—Alanna Martine Kilkeary, Glamour, 25 Mar. 2026
See All Example Sentences for hydrate
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Verb
Many are infused with hydrating and nourishing ingredients like vitamin E and castor oil to help strengthen lashes over time.
—Lily Wohlner, Allure, 28 Mar. 2026
Banish dull, dry winter skin with this hydrating serum.
—Bestreviews, Mercury News, 27 Mar. 2026
The in-store assortment includes hair essences and hydrating mists from Narka; PDRN and exosome scalp serums from Lilyeve, plus other offerings from La’dor, Healing Bird, Refilled and Growus, which are all priced under $40 and focus on innovative formats and ingredients.
—Noor Lobad, Footwear News, 25 Mar. 2026
Amazon Spring Sale hair care deals Stock up on shampoo and conditioner during Amazon's Big Spring Sale as well, including 20% off the Native Coconut & Vanilla Shampoo and Conditioner, packed with hydrating hair ingredients including coconut oil.
—Alanna Martine Kilkeary, Glamour, 25 Mar. 2026
See All Example Sentences for hydrate
Cite this Entry
“Hydrate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrate. Accessed 2 Apr. 2026.
Copy CitationKids Definition
hydrate
1 of 2 noun
hy·drate
ˈhī-ˌdrāt 
: a compound formed by the union of water with some other substance
a hydrate of copper sulfate
hydrate
2 of 2 verb
hydrated; hydrating
1
: to cause to take up or combine with water or the elements of water
2
: to supply with sufficient amounts of fluid or moisture
Medical Definition
hydrate
1 of 2 noun
hy·drate
ˈhī-ˌdrāt
: a compound (as Glauber's salt) formed by the union of water with some other substance
hydrate
2 of 2 verb
hydrated; hydrating
: to cause to take up or combine with water or the elements of water
: to become a hydrate
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