Source : Webster's Revised Unabridged Dictionary (1913)

Dehydrate \De*hy"drate\, v. t. (Chem.)
   To deprive of water; to render free from water; as, to
   dehydrate alcohol.

Source : WordNet®

dehydrate
     v 1: preserve by removing all water and liquids from; "carry
          dehydrated food on your camping trip" [syn: {desiccate}]
     2: remove water from; "All this exercise and sweating has
        dehydrated me" [syn: {desiccate}]
     3: lose water or moisture; "In the desert, you get dehydrated
        very quickly" [syn: {dry up}, {desiccate}] [ant: {hydrate}]