GNU Collaborative International Dictionary of English

Found 2 definitions

1.       
   dehydrate (?), v. t. To deprive of water; to render free from water; as, “to dehydrate alcohol; to dehydrate food for preservation”.
   
   [1913 Webster]
   
   
         
       

2.       
   dehydrate (?), v. i.
   1. to lose water or moisture.
   
   [PJC]
   
   
   2. to lose sufficient water to cause physiological distress; -- of living organisms; as, “victims trapped in the earthquake rubble may dehydrate if not found quickly.”
   
   [PJC]