: 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
Sarah Y. Wu, Glamour, 23 Apr. 2025
This conditioner contains a blend of plant extracts to hydrate hair, plus strengthening agents like pea sprout extract, which may improve your hair’s fullness.
—Sara Coughlin, SELF, 4 Apr. 2025
Nora Colomer
May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 30 Apr. 2025
Isotonic Hydra Gel Eye Masks by Espa: These eye masks instantly hydrate, plump, and brighten the under-eye and contour area, softening dehydration lines and signs of tiredness.
—Felicity Carter, Forbes.com, 29 Apr. 2025
See All Example Sentences for hydrate
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Noun
It’s also formulated with niacinamide, an ingredient that brightens, hydrates, supports your skin barrier, and helps balance sebum levels.
—Sarah Y. Wu, Glamour, 23 Apr. 2025
This conditioner contains a blend of plant extracts to hydrate hair, plus strengthening agents like pea sprout extract, which may improve your hair’s fullness.
—Sara Coughlin, SELF, 4 Apr. 2025
Verb
Original price: $13.99 Try the famous TikTok MONDAY Haircare MOISTURE Shampoo and Conditioner to hydrate, revitalize and smooth dry, brittle or coarse hair.
—Nora Colomer
May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 30 Apr. 2025
Isotonic Hydra Gel Eye Masks by Espa: These eye masks instantly hydrate, plump, and brighten the under-eye and contour area, softening dehydration lines and signs of tiredness.
—Felicity Carter, Forbes.com, 29 Apr. 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 6 May. 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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