: 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
Amelia Lucas, CNBC, 13 May 2026
While a big tub of the hydrating lotion is quite pricey, this travel-size version is on sale for $43 — and the ideal size for a carry-on bag!
—Alyssa Grabinski, PEOPLE, 11 May 2026
Proctor bragged about properly hydrating himself before practice, which is something past and present Dolphins coaches and trainers annually lecture the newcomers about to avoid dehydration, and the use of intravenous fluids.
—Omar Kelly, Miami Herald, 10 May 2026
Most curls benefit from a hydrating conditioner or deep conditioner to replenish moisture, followed by leave-in conditioners for curly hair and styling products like curl creams, mousses, or gels.
—Aimee Simeon, Glamour, 7 May 2026
See All Example Sentences for hydrate
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Verb
Its top brands, including Capri Sun, Oscar Mayer and Kraft Mac & Cheese, have struggled as consumers have sought fresher and more nutritious options to feed and hydrate their families.
—Amelia Lucas, CNBC, 13 May 2026
While a big tub of the hydrating lotion is quite pricey, this travel-size version is on sale for $43 — and the ideal size for a carry-on bag!
—Alyssa Grabinski, PEOPLE, 11 May 2026
Proctor bragged about properly hydrating himself before practice, which is something past and present Dolphins coaches and trainers annually lecture the newcomers about to avoid dehydration, and the use of intravenous fluids.
—Omar Kelly, Miami Herald, 10 May 2026
Most curls benefit from a hydrating conditioner or deep conditioner to replenish moisture, followed by leave-in conditioners for curly hair and styling products like curl creams, mousses, or gels.
—Aimee Simeon, Glamour, 7 May 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 15 May. 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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