: 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
Karen Brewer Grossman, Southern Living, 5 Dec. 2025
Along with its signature ingredient, this moisturizing cream is also spiked with hydrating sodium hyaluronate (a salt derived from hyaluronic acid) and glycerin.
—Deanna Pai, Allure, 4 Dec. 2025
In addition to the hydrating complex, the patches are infused with ku shen root to soothe inflammation and mugwort leaf extract for moisture.
—Iman Balagam, Vogue, 3 Dec. 2025
Scientifically formulated to hydrate better than water alone with an optimal blend of electrolytes, real cocoa and no artificial sweeteners or colors, Hydration Multiplier Hot Chocolate delivers holiday indulgence with a hot, hydrating twist.
—Adam Mills, MSNBC Newsweek, 3 Dec. 2025
See All Example Sentences for hydrate
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Verb
Conditioning butcher block countertops regularly with oil can help hydrate the wood and keep it from drying and cracking after use.
—Karen Brewer Grossman, Southern Living, 5 Dec. 2025
Along with its signature ingredient, this moisturizing cream is also spiked with hydrating sodium hyaluronate (a salt derived from hyaluronic acid) and glycerin.
—Deanna Pai, Allure, 4 Dec. 2025
In addition to the hydrating complex, the patches are infused with ku shen root to soothe inflammation and mugwort leaf extract for moisture.
—Iman Balagam, Vogue, 3 Dec. 2025
Scientifically formulated to hydrate better than water alone with an optimal blend of electrolytes, real cocoa and no artificial sweeteners or colors, Hydration Multiplier Hot Chocolate delivers holiday indulgence with a hot, hydrating twist.
—Adam Mills, MSNBC Newsweek, 3 Dec. 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 8 Dec. 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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