rehydrate

verb

re·​hy·​drate (ˌ)rē-ˈhī-ˌdrāt 

rehydrated; rehydrating; rehydrates

transitive verb

: to restore fluid to (something dehydrated)

rehydratable

(ˌ)rē-ˈhī-ˌdrā-tə-bəl 

adjective

rehydration

ˌrē-ˌhī-ˈdrā-shən 

noun

Examples of rehydrate in a Sentence

Recent Examples on the Web

Soak the root ball in water for about 30 minutes to rehydrate the roots. —Karen Brewer Grossman, Southern Living, 23 Oct. 2025

With its high content of natural electrolytes, coconut water has become popular as a low-sugar rehydrating alternative to sports drinks such as PepsiCo’s Gatorade. —Zinnia Lee, Forbes.com, 5 Sep. 2025

Kla uses dehydrated seaweed leaves and rehydrates them before wrapping it around the client. —Kansas City Star, 27 Aug. 2025

My favorite thing to do is dab a little bit of moisturizer on the back of my hand and use a fluffy brush to wash it over my makeup, just to rehydrate it. —Megan Decker, Refinery29, 28 July 2025

Word History

First Known Use

1945, in the meaning defined above

Rhymes for rehydrate

• dehydrate
• dihydrate
• trihydrate
• monohydrate

Kids Definition

rehydrate

verb

re·​hy·​drate (ˈ)rē-ˈhī-ˌdrāt 

: to restore fluid to (something dehydrated)

rehydration

ˌrē-ˌhī-ˈdrā-shən 

noun

Medical Definition

rehydrate

transitive verb

re·​hy·​drate (ˈ)rē-ˈhī-ˌdrāt 

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 

noun