: 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
Donnetta Monk, Essence, 24 Oct. 2025
Best applied to damp skin after cleansing, this is remarkably hydrating—catering to skn’s moisture levels and plumpness sans irritation.
—Deanna Pai, Vogue, 22 Oct. 2025
Avocado Eye Cream to hydrate and de-puff your under-eyes, along with the rich Creme De Corps Body Lotion to lock in moisture post-shower.
—Clara McMahon, PEOPLE, 21 Oct. 2025
Lemon Water Lemon water is a simple, hydrating replacement for coffee.
—Jillian Kubala, Health, 19 Oct. 2025
See All Example Sentences for hydrate
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Verb
Kamara swears by hydrating the scalp and minimal heavy product use.
—Donnetta Monk, Essence, 24 Oct. 2025
Best applied to damp skin after cleansing, this is remarkably hydrating—catering to skn’s moisture levels and plumpness sans irritation.
—Deanna Pai, Vogue, 22 Oct. 2025
Avocado Eye Cream to hydrate and de-puff your under-eyes, along with the rich Creme De Corps Body Lotion to lock in moisture post-shower.
—Clara McMahon, PEOPLE, 21 Oct. 2025
Lemon Water Lemon water is a simple, hydrating replacement for coffee.
—Jillian Kubala, Health, 19 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 29 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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