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de·hy·dra·tion

dehydration

 
pronunciation:
di haI dreI shn
part of speech: noun
definition: a serious physical condition in which one's body has lost a great deal of water. It can happen to both humans and animals if they do not get enough water.
When the woman was brought in to the hospital, she was suffering from dehydration.On a hot day, you need to drink more water to prevent dehydration.