: 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
Izzy Baskette, People.com, 10 July 2025
Exclusively made from ingredients that occur in nature, the product not only hydrates and moisturizes the skin but also nourishes and strengthens it, thanks to antioxidants, fatty acids, and vitamins A and E, says Dr. Zeichner.
—Erin Bunch, Glamour, 9 July 2025
Amelia McBride, Travel + Leisure, 10 July 2025
Rainwater is used to hydrate the plants after it's been collected from the rooftop of the glasshouse, which measures 760 m in length (about 2,500 ft) and is capable of producing 1,250 tonnes of strawberries each year.
—New Atlas, 6 July 2025
See All Example Sentences for hydrate
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Noun
Then, keep scrolling to shop Goop products that are up to 30 percent off during Prime Day, including a scalp scrub that rids your hair of product buildup and a body oil that deeply hydrates for glowy skin.
—Izzy Baskette, People.com, 10 July 2025
Exclusively made from ingredients that occur in nature, the product not only hydrates and moisturizes the skin but also nourishes and strengthens it, thanks to antioxidants, fatty acids, and vitamins A and E, says Dr. Zeichner.
—Erin Bunch, Glamour, 9 July 2025
Verb
Apply this Laneige Lip Sleeping Mask at the beginning of your flight, and your pout will be hydrated from takeoff to touchdown.
—Amelia McBride, Travel + Leisure, 10 July 2025
Rainwater is used to hydrate the plants after it's been collected from the rooftop of the glasshouse, which measures 760 m in length (about 2,500 ft) and is capable of producing 1,250 tonnes of strawberries each year.
—New Atlas, 6 July 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 14 Jul. 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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