: 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
Larry Stansbury, Essence, 19 Sep. 2025
All three fragrance-free products hydrate for 48 hours and visibly improve skin firmness in four weeks and activate the skin’s moisture barrier for more hydrated skin in one week.
—Celia Shatzman, Forbes.com, 18 Sep. 2025
Healthy, hydrating fruits and vegetables are perfect snacks for travel but be sure to eat that juicy plum during your flight.
—Jessie Beck, AFAR Media, 16 Sep. 2025
The Kylie Cosmetics Skin Tint Blurring Elixir doesn’t skimp in the pigment department—or the hydrating department (thanks to hyaluronic acid).
—Sophia Panych, Allure, 16 Sep. 2025
See All Example Sentences for hydrate
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Verb
Skin prep was key—hydrating masks from Neutrogena and Korean sheet masks with collagen or retinol kept her complexion plump before application.
—Larry Stansbury, Essence, 19 Sep. 2025
All three fragrance-free products hydrate for 48 hours and visibly improve skin firmness in four weeks and activate the skin’s moisture barrier for more hydrated skin in one week.
—Celia Shatzman, Forbes.com, 18 Sep. 2025
Healthy, hydrating fruits and vegetables are perfect snacks for travel but be sure to eat that juicy plum during your flight.
—Jessie Beck, AFAR Media, 16 Sep. 2025
The Kylie Cosmetics Skin Tint Blurring Elixir doesn’t skimp in the pigment department—or the hydrating department (thanks to hyaluronic acid).
—Sophia Panych, Allure, 16 Sep. 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 21 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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