: 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
Lily Wohlner, Allure, 10 Oct. 2025
From hydrating moisturizers to Vogue editor-favorite eye creams that tackle fine lines, to K-beauty oil cleansers that melt makeup in a mere moment.
—Jenny Berg, Vogue, 8 Oct. 2025
This luscious lip mask will keep your lips soft all season long thanks to hydrating and nourishing ingredients like shea butter, coconut oil, and squalane.
—Alicia Geigel, Southern Living, 8 Oct. 2025
The ultra-hydrating formula contains natural ingredients like avocado oil and vitamin E, which are moisturizing superstars.
—Gina Vaynshteyn, StyleCaster, 8 Oct. 2025
See All Example Sentences for hydrate
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Verb
It’s made of 75% water, plus hydrating aloe vera, hyaluronic acid, glycerin, and antioxidant-rich green tea to keep lips soft and plump.
—Lily Wohlner, Allure, 10 Oct. 2025
From hydrating moisturizers to Vogue editor-favorite eye creams that tackle fine lines, to K-beauty oil cleansers that melt makeup in a mere moment.
—Jenny Berg, Vogue, 8 Oct. 2025
This luscious lip mask will keep your lips soft all season long thanks to hydrating and nourishing ingredients like shea butter, coconut oil, and squalane.
—Alicia Geigel, Southern Living, 8 Oct. 2025
The ultra-hydrating formula contains natural ingredients like avocado oil and vitamin E, which are moisturizing superstars.
—Gina Vaynshteyn, StyleCaster, 8 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 11 Oct. 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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