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dehydrate

[dee-hahy-dreyt]
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verb (used with object), de·hy·drat·ed, de·hy·drat·ing.
  1. to deprive (a chemical compound) of water or the elements of water.
  2. to free (fruit, vegetables, etc.) from moisture for preservation; dry.
  3. to remove water from (the body or a tissue).
  4. to deprive of spirit, force, or meaning; render less interesting or effectual.
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verb (used without object), de·hy·drat·ed, de·hy·drat·ing.
  1. to lose water or moisture: Milk dehydrates easily.
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Origin of dehydrate

First recorded in 1850–55; de- + hydrate

Synonym study

2. See evaporate.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for dehydrate

Historical Examples

  • It is employed to dehydrate certain oils with which the pork-packer adulterates lard.

    Highways and Byways in Surrey

    Eric Parker

  • Drop absolute alcohol on to the section from a drop bottle, to dehydrate it.

  • Decolourise and dehydrate rapidly with absolute alcohol until there remains only a very faint bluish tint.

  • Flood with several changes of absolute alcohol to dehydrate the section.


British Dictionary definitions for dehydrate

dehydrate

verb
  1. to lose or cause to lose water; make or become anhydrous
  2. 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
  3. to lose or deprive of water, as the body or tissues
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Derived Formsdehydration, noundehydrator, 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

Word Origin and History for dehydrate

v.

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

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Online Etymology Dictionary, © 2010 Douglas Harper

dehydrate in Medicine

dehydrate

(dē-hīdrāt′)
v.
  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.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.