: 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
Kirstyn Hill, Health, 21 Nov. 2025
As their name suggests, these creams exist to quite literally repair our skin’s moisture barrier with nourishing and deeply hydrating ingredients that can improve moisture levels, improve suppleness, and make the skin feel a little more equipped to handle the frost.
—Jessie Quinn, StyleCaster, 20 Nov. 2025
These are whipped into a viscous, hydrating serum that my skin drinks up in seconds.
—Emily Orofino, Vogue, 19 Nov. 2025
Its gentle formulation soothes and hydrates the skin with ease, offering a buttery yet nongreasy consistency and a nourishing feel.
—Denise Primbet, Glamour, 18 Nov. 2025
See All Example Sentences for hydrate
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Verb
Staying hydrated, eating a balanced, fiber-rich diet, and taking over-the-counter (OTC) medications may help relieve constipation.
—Kirstyn Hill, Health, 21 Nov. 2025
As their name suggests, these creams exist to quite literally repair our skin’s moisture barrier with nourishing and deeply hydrating ingredients that can improve moisture levels, improve suppleness, and make the skin feel a little more equipped to handle the frost.
—Jessie Quinn, StyleCaster, 20 Nov. 2025
These are whipped into a viscous, hydrating serum that my skin drinks up in seconds.
—Emily Orofino, Vogue, 19 Nov. 2025
Its gentle formulation soothes and hydrates the skin with ease, offering a buttery yet nongreasy consistency and a nourishing feel.
—Denise Primbet, Glamour, 18 Nov. 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 24 Nov. 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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