: 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
Emmanuella Ogbonna, Health, 26 Dec. 2025
This Pure Daily steamer has an ultrasonic vaporizer that releases fine mist and gently hydrates skin.
—Sian Babish, PEOPLE, 25 Dec. 2025
Lazy’s Double Duty Serum Moisturizer Duo features squalane, glycerin, hyaluronic acid, and peptides to hydrate, moisturize, and support the skin’s natural healing response.
—Jacqueline Kilikita, Refinery29, 24 Dec. 2025
Plus, this concealer doubles as a treat for your skin, with aloe to soothe and hydrate, lanolin acid to lock in moisture, and safflower seed oil to nourish without feeling heavy.
—Lily Wohlner, Allure, 23 Dec. 2025
See All Example Sentences for hydrate
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Verb
While an effective hydrating drink, pickle juice has a very high sodium content.
—Emmanuella Ogbonna, Health, 26 Dec. 2025
This Pure Daily steamer has an ultrasonic vaporizer that releases fine mist and gently hydrates skin.
—Sian Babish, PEOPLE, 25 Dec. 2025
Lazy’s Double Duty Serum Moisturizer Duo features squalane, glycerin, hyaluronic acid, and peptides to hydrate, moisturize, and support the skin’s natural healing response.
—Jacqueline Kilikita, Refinery29, 24 Dec. 2025
Plus, this concealer doubles as a treat for your skin, with aloe to soothe and hydrate, lanolin acid to lock in moisture, and safflower seed oil to nourish without feeling heavy.
—Lily Wohlner, Allure, 23 Dec. 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 28 Dec. 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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