rehydrate

verb

re·​hy·​drate (ˌ)rē-ˈhī-ˌdrāt How to pronounce rehydrate (audio)
rehydrated; rehydrating; rehydrates
Synonyms of rehydratenext

transitive verb

: to restore fluid to (something dehydrated)
rehydratable
(ˌ)rē-ˈhī-ˌdrā-tə-bəl How to pronounce rehydrate (audio)
adjective
rehydration
ˌrē-ˌhī-ˈdrā-shən How to pronounce rehydrate (audio)
noun

Examples of rehydrate in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Set the nursery pot in water for 30 to 45 minutes to rehydrate the roots. — Barbara Gillette, The Spruce, 30 Aug. 2026 Having adequate staffing so firefighters aren’t overworked and have meaningful enough recovery time to rehydrate, cool down and sleep between shifts are important. — Julian L. Gallegos, The Conversation, 27 Aug. 2026 The whale, a 23-year-old female named Peekachu, died suddenly Tuesday as caretakers tried to rehydrate her, Chicago’s Shedd Aquarium said in a news release. — Cybele Mayes-Osterman, ABC News, 27 Aug. 2026 This Loops x Dune mist is so refreshing— an instant burst of coolness that also soothes and rehydrates my skin without disrupting my makeup. — Kara Jillian Brown, InStyle, 26 Aug. 2026 See All Example Sentences for rehydrate

Word History

First Known Use

1945, in the meaning defined above

Time Traveler
The first known use of rehydrate was in 1945

Rhymes for rehydrate

See All Rhymes for rehydrate

Browse Nearby Words

rehydratable
rehydrate
rehydration
See all Nearby Words

Cite this Entry

“Rehydrate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rehydrate. Accessed 2 Sep. 2026.

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Kids Definition

rehydrate

verb
re·​hy·​drate (ˈ)rē-ˈhī-ˌdrāt How to pronounce rehydrate (audio)
: to restore fluid to (something dehydrated)
rehydration
ˌrē-ˌhī-ˈdrā-shən How to pronounce rehydrate (audio)
noun

Medical Definition

rehydrate

transitive verb
re·​hy·​drate (ˈ)rē-ˈhī-ˌdrāt How to pronounce rehydrate (audio)
rehydrated; rehydrating
: to restore fluid to (something dehydrated)
especially : to restore body fluid lost in dehydration to
rehydrate a patient
rehydration
ˌrē-ˌhī-ˈdrā-shən How to pronounce rehydrate (audio)
noun

More from Merriam-Webster on rehydrate

Thesaurus: All synonyms and antonyms for rehydrate

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