Definition of dehydrate in English:


Pronunciation /diːhʌɪˈdreɪt//diːˈhʌɪdreɪt/


[WITH OBJECT]often as adjective dehydrated
  • 1Cause (a person or their body) to lose a large amount of water.

    ‘his body temperature was high and he had become dehydrated’
    • ‘Have a glass of water with your meals instead of caffeinated drinks like soda and coffee, which dehydrate the body.’
    • ‘There were people being sick and confined to their rooms and lots of people were dehydrated.’
    • ‘You know that you can't live long without water, but how do you know if you're dehydrated?’
    • ‘Thus, when a person is dehydrated by more than 2% of body weight, both heart rate and body temperature are elevated during exercise.’
    • ‘75 percent of Americans are chronically dehydrated - mainly because your body is low on water long before your thirst response alerts you.’
    • ‘Use composite dressings cautiously if the patient is dehydrated or has fragile skin.’
    • ‘Yes, if the athlete is dehydrated, any water will accomplish that, dumbo!’
    • ‘If your child is dehydrated, it is important to replace lost body fluids right away.’
    • ‘The doctor suggested she lie on her side and drink two large glasses of water to make sure she wasn't dehydrated.’
    • ‘The fact that it was so warm caught a lot of people out and I was dehydrated rather than anything else.’
    • ‘Coffee can also dehydrate you, so counter its effects by drinking water.’
    • ‘If you are dehydrated, the test will overestimate your body fat by as much as 3 percentage points.’
    • ‘He was dehydrated, his throat was swelling, and he had lost blood.’
    • ‘My best friend passed out on the dance floor and that was the only way she was able to get a glass of water, when she was totally dehydrated.’
    • ‘If you're dehydrated, your body may not recover as quickly after a workout (leaving you sore longer).’
    • ‘The rumor that coffee dehydrates people lacks scientific support.’
    • ‘When you're dehydrated, your skin is one of the first organs to show it.’
    • ‘The more water you drink, the less dehydrated you will become, and the less severe your hangover will be.’
    • ‘Many athletes and the general norm of people are dehydrated without being aware they are.’
    • ‘I'm dehydrated, but I can't stand the thought of water.’
    dry up, dry out, lose water, become dry
    View synonyms
    1. 1.1no object Lose a large amount of water from the body.
      ‘the nurses made sure I didn't dehydrate’
      • ‘When my body can dehydrate and lose its water just like the land drying up.’
      • ‘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.’
      • ‘If these minerals are heated, they will dehydrate and lose their water of hydration.’
    2. 1.2 Remove water from (food) in order to preserve and store it.
      ‘dehydrated mashed potatoes’
      • ‘It is susceptible to noble rot or Botrytis (the fungus that attacks certain ripe grapes and dehydrates them so that they give wines of immense richness and sweetness).’
      • ‘He then used a vacuuming process to dehydrate this softened grain, leaving behind a thick, sweet goo.’
      • ‘They also pack dehydrated foods like dried fruit and mashed potatoes.’
      • ‘Well, usually when you take the skin off it can be preserved in a number of different ways and very often it's salted and that dehydrates it to preserve it and stop bacteria decomposing it.’
      • ‘These sulfur-containing additives are used as preservatives in dried fruits, wines, and dehydrated potato products like mashed potato flakes.’
      • ‘He grimaced at the thought of eating dehydrated food; I described the simple pleasure of drinking ice-cold water from a mountain stream.’
      • ‘The most dehydrated grapes in the press may not in any case yield juice until being pressed twice or three times.’
      • ‘The goal here is essentially to dehydrate the vegetables and caramelize the outside at the same time.’
      • ‘Making pasta from zucchini or dehydrating fruits is time-consuming, and many raw meals can take days to prepare.’
      • ‘At the far extreme of technology, meat is dehydrated by freeze-drying to provide lightweight military rations.’
      • ‘The reason behind this is that salt effectively dehydrates the polymer by disruption of hydrogen bonding with water, similar to the effect of increasing temperatures.’
      • ‘One division of my business harvests and dehydrates fruits and vegetables for use in papermaking formulas.’
      • ‘I expect to lose half a stone, as I'll only be eating dehydrated food and getting water every 10 kilometres.’
      dry, dry up, dry out, desiccate, make dry, dehumidify, remove the moisture from
      View synonyms


Late 19th century: from de- (expressing removal) + Greek hudros, hudr- ‘water’.