The Collaborative International Dictionary of English v.0.48:

Damp \Damp\ (d[a^]mp), a. [Compar. Damper; superl. Dampest.]
   1. Being in a state between dry and wet; moderately wet;
      moist; humid.
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            O'erspread with a damp sweat and holy fear.
                                                  --Dryden.
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   2. Dejected; depressed; sunk. [R.]
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            All these and more came flocking, but with looks
            Downcast and damp.                    --Milton.
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