English Dictionary

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hydrate (ˈhaɪdreɪt Pronunciation for hydrate



  1. a chemical compound containing water that is chemically combined with a substance and can usually be expelled without changing the constitution of the substance
  2. a chemical compound that can dissociate reversibly into water and another compound. For example sulphuric acid (H2SO4) dissociates into sulphur trioxide (SO3) and water (H2O)
  3. (not in technical usage) a chemical compound, such as a carbohydrate, that contains hydrogen and oxygen atoms in the ratio two to one


  1. to undergo or cause to undergo treatment or impregnation with water

Derived Forms

hyˈdration noun
ˈhydrator noun

Word Origin

C19: from hydro- + -ate1


View thesaurus entry
= moisten, wet, water, soak, dampen, moisturize, bedew

Example Sentences Including 'hydrate'

hydrate gain) is exactly balanced by the rate of respiration (carbohydrate loss).
McCahill, T. A. Biology Basic Facts
Animals as complex as worms cannot live off the constituents of methane hydrate , but some bacteria can.
New Scientist (1998)
Delay fatigue, boost energy and keep performance levels high with fluids designed to hydrate fast.
Times, Sunday Times (2002)
It's a pleasant flavoured drink packed with energy to hydrate the whole body.
Belfast Telegraph (2003)
Someone had slipped a massive overdose of chloral hydrate into the bottle.
Brierley, David Skorpion's Death
Sure it's getting chilly, but you still need to hydrate your skin.
Courier, Sunday Mail (2004)


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