: 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
Esme Benjamin, People.com, 6 Aug. 2025
This airy gel-cream is built on a base of birch tree sap, which hydrates, brightens, and strengthens skin.
—Deanna Pai, Vogue, 4 Aug. 2025
Adam Mills, MSNBC Newsweek, 13 Aug. 2025
This fine, fast-absorbing mist is packed with nourishing oils—like sunflower seed, grapeseed, and oat—to deeply hydrate and soften skin.
—Christa Joanna Lee, Allure, 12 Aug. 2025
See All Example Sentences for hydrate
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Noun
This multitasking formula from Dermalogica softens and hydrates skin as well as depuffs, brightens, and exfoliates it.
—Esme Benjamin, People.com, 6 Aug. 2025
This airy gel-cream is built on a base of birch tree sap, which hydrates, brightens, and strengthens skin.
—Deanna Pai, Vogue, 4 Aug. 2025
Verb
New & Noteworthy The Olay Summer Fizz Body Wash Collection is formulated with nourishing ingredients like niacinamide, pro-glycerin, lipids and a hyaluronic serum complex to deeply hydrate dry, thirsty skin to become visibly supple and dewy.
—Adam Mills, MSNBC Newsweek, 13 Aug. 2025
This fine, fast-absorbing mist is packed with nourishing oils—like sunflower seed, grapeseed, and oat—to deeply hydrate and soften skin.
—Christa Joanna Lee, Allure, 12 Aug. 2025
See All Example Sentences for hydrate
Cite this Entry
“Hydrate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrate. Accessed 21 Aug. 2025.
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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