de ‧ hy ‧ drate /ˌdiːhaɪˈdreɪt $ diːˈhaɪdreɪt/ BrE AmE verb
1 . [transitive] to remove the liquid from a substance such as food or a chemical ⇨ rehydrate , hydrate :
The substance is dehydrated and stored as powder.
2 . [intransitive and transitive] to lose too much water from your body, or to make this happen:
Alcohol dehydrates the body.
—dehydrated adjective
—dehydration /ˌdiːhaɪˈdreɪʃ ə n/ noun [uncountable]