Source : Webster's Revised Unabridged Dictionary (1913)

Arid \Ar"id\, a. [L. aridus, fr. arere to be dry: cf. F. aride.]
   Exhausted of moisture; parched with heat; dry; barren. ``An
   arid waste.'' --Thomson.

Source : WordNet®

arid
     adj 1: lacking sufficient water or rainfall; "an arid climate"; "a
            waterless well"; "miles of waterless country to cross"
            [syn: {waterless}]
     2: lacking vitality or spirit; lifeless; "a technically perfect
        but arid performance of the sonata"; "a desiccate
        romance"; "a prissy and emotionless creature...settles
        into a mold of desiccated snobbery"-C.J.Rolo [syn: {desiccate},
         {desiccated}]