: 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
Brandee Gruener, Southern Living, 30 Oct. 2025
The fragrance-free formula nourishes both scalp and lengths, with hyaluronic acid, glycerin, ceramides, and niacinamide working together to hydrate, strengthen, and support a healthier hair environment.
—Conçetta Ciarlo, Vogue, 30 Oct. 2025
Belif's The True Cream Aqua Bomb is packed with the most hydrating ingredients on the block, like hyaluronic acid, niacinamide, and a ton of herbal goodies (like lady’s mantle) to soothe and cool your skin.
—Lily Wohlner, Allure, 29 Oct. 2025
To stay properly hydrated, aim to drink somewhere between two to three liters, or 8 to 12 cups, of water each day, along with hydrating fruits and vegetables like cucumber and watermelon.
—Beth Krietsch, Outside, 25 Oct. 2025
See All Example Sentences for hydrate
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Verb
Check soil moisture before the first frost and give the roots a good soaking to hydrate the shrubs.
—Brandee Gruener, Southern Living, 30 Oct. 2025
The fragrance-free formula nourishes both scalp and lengths, with hyaluronic acid, glycerin, ceramides, and niacinamide working together to hydrate, strengthen, and support a healthier hair environment.
—Conçetta Ciarlo, Vogue, 30 Oct. 2025
Belif's The True Cream Aqua Bomb is packed with the most hydrating ingredients on the block, like hyaluronic acid, niacinamide, and a ton of herbal goodies (like lady’s mantle) to soothe and cool your skin.
—Lily Wohlner, Allure, 29 Oct. 2025
To stay properly hydrated, aim to drink somewhere between two to three liters, or 8 to 12 cups, of water each day, along with hydrating fruits and vegetables like cucumber and watermelon.
—Beth Krietsch, Outside, 25 Oct. 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 5 Nov. 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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