Definition of dehydrate in English:

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Pronunciation: /dēˈhīˌdrāt/


[with object] (often as adjective dehydrated)
1Cause (a person or a person’s body) to lose a large amount of water: his body temperature was high, and he had become dehydrated
More example sentences
  • If you're dehydrated, your body may not recover as quickly after a workout (leaving you sore longer).
  • When you're dehydrated, your skin is one of the first organs to show it.
  • Thus, when a person is dehydrated by more than 2% of body weight, both heart rate and body temperature are elevated during exercise.
dry up/out, lose water
thirsty, dry, in need of water
informal parched
1.1 [no object] Lose a large amount of water from the body.
Example sentences
  • When my body can dehydrate and lose its water just like the land drying up.
  • If these minerals are heated, they will dehydrate and lose their water of hydration.
  • The w profiles in the plant were affected by these soil w, becoming more negative as the soil dehydrated, but recovering when water was resupplied.
1.2Remove water from (food) in order to preserve and store it: dehydrated mashed potatoes
More example sentences
  • They also pack dehydrated foods like dried fruit and mashed potatoes.
  • He grimaced at the thought of eating dehydrated food; I described the simple pleasure of drinking ice-cold water from a mountain stream.
  • At the far extreme of technology, meat is dehydrated by freeze-drying to provide lightweight military rations.
dry (out), desiccate, dehumidify, effloresce
dried, dry, dessicated



Pronunciation: /dēˈhīˌdrādər/
Example sentences
  • Food dehydrators has been around for a long time, and they sell really well because people are into health, again.
  • Besides making yogurt and leavening bread, these dehydrators also can soften honey or butter, re-crisp crackers or popcorn, sprout seeds or hatch chicks.
  • Fancier dehydrators, with heat regulators and fans to circulate the air, work faster, but the price can zoom to several hundred dollars for serious preserving tools.


Late 19th century: from de- (expressing removal) + Greek hudōr, hudr- 'water'.

For editors and proofreaders

Syllabification: de·hy·drate

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