hydration
Americannoun
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the act or process of supplying water to oneself, another person, or a part of the body.
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the act or process of chemically hydrating something.
Explanation
Hydration is what happens when something absorbs water. If your favorite plant is brown and droopy, it may need hydration — or it may be time to buy a new plant! Hydration comes from the verb hydrate, which was originally defined as "form a hydrate" (a chemical compound that includes water), but eventually came to also mean "to restore moisture." Whenever you moisten or add water to something, including drinking a nice big cold glass of water when you're thirsty, that's hydration.
Vocabulary lists containing hydration
Physical Education - Introductory
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Physical Education - Middle School and High School
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hydr, hydro
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Stacey Andrade-Wells, chief marketing officer of Unilever’s hydration brand Liquid IV until earlier this month, has resurfaced at the baby formula brand Bobbie.
From The Wall Street Journal ● Aug. 13, 2026
If venues are air conditioned, are FIFA’s hydration breaks necessary?
From Los Angeles Times ● Aug. 10, 2026
Fifa has claimed the World Cup is "under-monetised", but hydration break adverts, dynamic ticket pricing and record broadcast and sponsorship rights have put the 2026 edition on track to generate record revenues.
From BBC ● Aug. 8, 2026
Evidence on electric fan use in hot weather suggests that fans can be useful in many hot conditions, but their safety depends on temperature, humidity, age, hydration and health.
From Science Daily ● Jul. 29, 2026
It’s the end of June, and Grandpa Ed will soon be meeting her midway during the warmer weather, just to refuel her hydration.
From "A Heart in a Body in the World" by Deb Caletti
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
