dehydrate verb definition in Diet topic from the Oxford Advanced Learner's Dictionary

dehydrate

 verb: Diet topic
1 [transitive, usually passive] dehydrate something to remove the water from something, especially food, in order to preserve it2 [intransitive, transitive] to lose too much water from your body; to make a person’s body lose too much water Runners can dehydrate very quickly in this heat. dehydrate somebody the dehydrating effects of alcohol