: 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
Liz O'Connell, MSNBC Newsweek, 22 Aug. 2025
This serum also did wonders for my typically knotty hair in the winter and hydrated my roots even after just one application and blow-dry.
—Lisa Desantis, Glamour, 21 Aug. 2025
Infused with jojoba seed oil and grape and raspberry-seed extracts, the cream blush hydrates the skin and lends it a youthful, lit-from-within glow.
—Jenny Berg, Allure, 20 Aug. 2025
Powered by hydrating Mirsalehi honey and strengthening milk proteins, the glossy, milky formula preps hair for blowouts, waves, curls and straight styles.
—Angela Lei, Forbes.com, 19 Aug. 2025
See All Example Sentences for hydrate
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Verb
The camera, placed behind the food and water bowls, showed her thirsty cat hydrating herself.
—Liz O'Connell, MSNBC Newsweek, 22 Aug. 2025
This serum also did wonders for my typically knotty hair in the winter and hydrated my roots even after just one application and blow-dry.
—Lisa Desantis, Glamour, 21 Aug. 2025
Infused with jojoba seed oil and grape and raspberry-seed extracts, the cream blush hydrates the skin and lends it a youthful, lit-from-within glow.
—Jenny Berg, Allure, 20 Aug. 2025
Powered by hydrating Mirsalehi honey and strengthening milk proteins, the glossy, milky formula preps hair for blowouts, waves, curls and straight styles.
—Angela Lei, Forbes.com, 19 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 1 Sep. 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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