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[dee-hahy-dreyt] /diˈhaɪ dreɪt/
verb (used with object), dehydrated, dehydrating.
to deprive (a chemical compound) of water or the elements of water.
to free (fruit, vegetables, etc.) from moisture for preservation; dry.
to remove water from (the body or a tissue).
to deprive of spirit, force, or meaning; render less interesting or effectual.
verb (used without object), dehydrated, dehydrating.
to lose water or moisture:
Milk dehydrates easily.
1850-55; de- + hydrate
Synonym Study
2. See evaporate. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for dehydrated
  • It was hot, no one got dehydrated and no one fainted from hunger.
  • Her feet were cold, she was dehydrated, and her forehead was on fire.
  • They do more than smell: they contain tiny bones that keep us from getting dehydrated.
  • Recently, he used dehydrated squash and sour cream powders to match a soup entree.
  • When the body is dehydrated, vasopressin levels rise, prompting the kidneys to hold onto water.
  • Anyone who has ever woken up dehydrated after a night of heavy drinking knows this feeling as a hangover.
  • She is thin, in that willowy, dehydrated way all socialites are thin.
  • The wraps were not effective at reducing browning of the partially dehydrated apple pieces.
British Dictionary definitions for dehydrated


/diːˈhaɪdreɪt; ˌdiːhaɪˈdreɪt/
to lose or cause to lose water; make or become anhydrous
to lose or cause to lose hydrogen atoms and oxygen atoms in the proportions in which they occur in water, as in a chemical reaction
to lose or deprive of water, as the body or tissues
Derived Forms
dehydration, noun
dehydrator, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for dehydrated



1854, from de- + hydrate (v.). A chemical term at first, given a broader extension 1880s. Related: Dehydration (1834).

Online Etymology Dictionary, © 2010 Douglas Harper
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dehydrated in Medicine

dehydrate (dē-hī'drāt')
v. de·hy·drat·ed, de·hy·drat·ing, de·hy·drates

  1. To remove water from; make anhydrous.

  2. To preserve by removing water from something, such as vegetables.

  3. To deplete the bodily fluids of an individual.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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