: 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
Tamim Alnuweiri, InStyle, 16 June 2026
And don't forget to wear a sun hat and sunscreen, and drink ample water to hydrate.
—Lauren Landers, Better Homes & Gardens, 15 June 2026
After longer workout sessions, watermelon, oranges, berries, cucumbers or other water-rich fruits and vegetables also can help hydrate.
—Jacqueline Howard, CNN Money, 13 June 2026
Atlanta Fire has two medical tents set up at Centennial Olympic Park with tools to cool people down and hydrate them to try to keep them out of the hospital.
—Madeline Montgomery, CBS News, 12 June 2026
See All Example Sentences for hydrate
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Verb
MDSolarSciences’s Daily Perfecting Moisturizer is a plumping and hydrating formula that just so happens to include SPF 30 protection.
—Tamim Alnuweiri, InStyle, 16 June 2026
And don't forget to wear a sun hat and sunscreen, and drink ample water to hydrate.
—Lauren Landers, Better Homes & Gardens, 15 June 2026
After longer workout sessions, watermelon, oranges, berries, cucumbers or other water-rich fruits and vegetables also can help hydrate.
—Jacqueline Howard, CNN Money, 13 June 2026
Atlanta Fire has two medical tents set up at Centennial Olympic Park with tools to cool people down and hydrate them to try to keep them out of the hospital.
—Madeline Montgomery, CBS News, 12 June 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 18 Jun. 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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