The Collaborative International Dictionary of English v.0.48:

Thirsty \Thirst"y\, a. [Compar. Thirstier; superl.
   Thirstiest.] [AS. ?urstig. See Thirst, n.]
   1. Feeling thirst; having a painful or distressing sensation
      from want of drink; hence, having an eager desire.
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            Give me, I pray thee, a little water to drink, for I
            am thirsty.                           --Judges iv.
                                                  19.
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   2. Deficient in moisture; dry; parched.
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            A dry and thirsty land, where no water is. --Ps.
                                                  lxiii. 1.
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            When in the sultry glebe I faint,
            Or on the thirsty mountain pant.      --Addison.
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