: 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
Jenny Berg, Vogue, 2 June 2025
Additionally, the serum hydrates with centella asiatica leaf water which helps your skin barrier retain water and reduces redness.
—Kristen Philipkoski, Forbes.com, 29 May 2025
Anna Skinner, MSNBC Newsweek, 4 June 2025
It’s infused with caffeine to de-puff, shea butter to hydrate, and licorice root to calm and even skin tone.
—Kristen Philipkoski, Forbes.com, 29 May 2025
See All Example Sentences for hydrate
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Noun
Infused with skin-loving ingredients like hyaluronic acid, hibiscus extract, and green mandarin water, this mist not only provides a radiant tan but also hydrates and refreshes the skin.
—Jenny Berg, Vogue, 2 June 2025
Additionally, the serum hydrates with centella asiatica leaf water which helps your skin barrier retain water and reduces redness.
—Kristen Philipkoski, Forbes.com, 29 May 2025
Verb
The Mojave National Preserve also asked people to be on the lookout for desert tortoises, which emerge after rain to hydrate and eat the vegetation.
—Anna Skinner, MSNBC Newsweek, 4 June 2025
It’s infused with caffeine to de-puff, shea butter to hydrate, and licorice root to calm and even skin tone.
—Kristen Philipkoski, Forbes.com, 29 May 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 8 Jun. 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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