dehydration

noun

de·​hy·​dra·​tion ˌdē-ˌhī-ˈdrā-shən 

: the process of dehydrating

especially : an abnormal depletion of body fluids

Examples of dehydration in a Sentence

Recent Examples on the Web

Because their immune systems are still developing, influenza can hit them hard and fast and can quickly spiral into serious complications including pneumonia, extreme dehydration, brain inflammation or death. — Jacqueline Howard, CNN Money, 4 Nov. 2026

Keep in mind that drinking plenty of water is also important for overall energy, as even mild dehydration can trigger fatigue. — Cristina Mutchler, Verywell Health, 2 Nov. 2026

Lead poisoning can cause brain swelling, trouble breathing, weak muscles, dehydration, starvation, kidney and liver problems, or seizures, Young explains. — Margherita Bassi, Popular Science, 2 Nov. 2026

Symptoms of foodborne illness may include diarrhea, vomiting, fever, stomach cramps, and dehydration. — Sj McShane, Martha Stewart, 1 Nov. 2026

Word History

First Known Use

1840, in the meaning defined above

Rhymes for dehydration

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Medical Definition

dehydration

noun

de·​hy·​dra·​tion ˌdē-hī-ˈdrā-shən 

: the process of dehydrating

especially : an abnormal depletion of body fluids