Noah Webster's Dictionary (n.) Moderate humidity; moisture; fogginess; moistness.

Multi-Version Concordance Dampness (1 Occurrence) Song of Songs 5:2 I was asleep, but my heart was awake. It is the voice of my beloved who knocks: "Open to me, my sister, my love, my dove, my undefiled; for my head is filled with dew, and my hair with the dampness of the night." (WEB NIV)