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

Daily medications, either by prescription or over the counter, may interact with heat or lead to dehydration or overheating. — Dinah Voyles Pulver, USA Today, 3 July 2026

Her behavior began to raise concerns among the ASLC's staff, who also noted signs of dehydration in the seal pup. — Rachel Raposas, PEOPLE, 4 July 2026

Know the signs of heat illness Heat exhaustion is the first step toward heat stroke; it is caused by overheating and dehydration—specifically, the loss of salt and water through sweat. — Claire Cameron, Scientific American, 2 July 2026

Untreated dehydration and heat exhaustion can worsen into heatstroke. — Nicole Bennett, AJC.com, 1 July 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