Source : Webster's Revised Unabridged Dictionary (1913)

Damp \Damp\, a. [Compar. {Damper}; superl. {Dampest}.]
   1. Being in a state between dry and wet; moderately wet;
      moist; humid.

            O'erspread with a damp sweat and holy fear.
                                                  --Dryden.

   2. Dejected; depressed; sunk. [R.]

            All these and more came flocking, but with looks
            Downcast and damp.                    --Milton.