: 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
Caley Sturgill, Southern Living, 4 Apr. 2026
Consider composting leaves or collecting rainwater to hydrate your plants.
—Lauren Landers, Better Homes & Gardens, 3 Apr. 2026
My favorite is the hydrating spray from Iris & Romeo.
—Jake Henry Smith, Glamour, 2 Apr. 2026
The Magic Cream is packed with powerhouse ingredients like hyaluronic acid and shea butter to deeply hydrate, and vitamins C and E to brighten and protect your skin.
—Kyra Surgent, InStyle, 1 Apr. 2026
See All Example Sentences for hydrate
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Verb
To complete your routine, check out more makeup that doubles as skincare below, like Neutrogena’s Healthy Skin foundation from the same collection, tinted lip balms with SPF, hydrating under-eye brighteners, and more.
—Caley Sturgill, Southern Living, 4 Apr. 2026
Consider composting leaves or collecting rainwater to hydrate your plants.
—Lauren Landers, Better Homes & Gardens, 3 Apr. 2026
My favorite is the hydrating spray from Iris & Romeo.
—Jake Henry Smith, Glamour, 2 Apr. 2026
The Magic Cream is packed with powerhouse ingredients like hyaluronic acid and shea butter to deeply hydrate, and vitamins C and E to brighten and protect your skin.
—Kyra Surgent, InStyle, 1 Apr. 2026
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 Apr. 2026.
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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