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

Before planting, soak the mum in cool water for about 20 minutes to rehydrate the roots. —Karen Brewer Grossman, Southern Living, 12 Sep. 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

Stay hydrated: Drink extra water to replenish and rehydrate your body. —Lana Barhum, Verywell Health, 19 July 2025

Alcohol-free mouth rinses and saliva substitutes, which come in the form of both sprays and gels, can also help to rehydrate your mouth, says Dr. Han. —Amy Marturana Winderl, SELF, 8 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