Definitions

from The Century Dictionary.

  • noun The process of combining or impregnating with water, or the resulting condition. Also hydratation.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) The act of becoming, or state of being, a hydrate.
  • noun (Chem.) water chemically combined with some substance to form a hydrate; -- distinguished from water of crystallization.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry the incorporation of water molecules into a complex with those of another compound
  • noun biology the process of providing an adequate amount of water to body tissues
  • noun construction the chemical reaction by which a substance (such as cement) combines with water, giving off heat to form a crystalline structure in its setting and hardening.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the process of combining with water; usually reversible

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

hydrate +‎ -ion

Examples

  • She was very sick at both ends and needed hydration from the vet.

    Jasper update

  • The new time trial bike also incorporates a built-in hydration system that allows

    Armstrong's tour of duty

  • I am told something I’d never considered: in desert countries most of one’s hydration is lost at the back of the neck, which can quickly lead to heat stroke, so a headscarf that wraps around the neck is essential to block this loss.

    Archive 2009-08-01

  • I am told something I’d never considered: in desert countries most of one’s hydration is lost at the back of the neck, which can quickly lead to heat stroke, so a headscarf that wraps around the neck is essential to block this loss.

    Overcoming Speechlessness: A Poet Encounters "the horror" in Rwanda, Eastern Congo and Palestine/Israel

  • Because if, in fact, it had something to do with the environment, as opposed to the -- you know, the hydration, that is going to make or break a criminal case here.

    CNN Transcript Oct 19, 2009

  • Paul McCarthy--you are the man. you know why. it's called hydration, and you were there when i needed you today. thanks.

    a balmy december Sunday

  • During this reaction, called hydration, crystals radiate outwards from the cement grains and mesh with other adjacent crystals or adhere to the adjacent aggregates.

    Cement

  • Paul McCarthy--you are the man. you know why. it's called hydration, and you were there when i needed you today. thanks.

    Archive 2008-12-01

  • The difference between Terri and these victims is that these people are not braindead and have been denied nourishment and hydration, that is a crime.

    Think Progress » “One of the Worst Abandonments of Americans on American Soil Ever”

  • · The reaction of cement and water (known as hydration) liberates calcium hydroxide (slaked lime) which reacts with the clay particles to form a kind of pozzolanic binder.

    Chapter 4

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