Webster's Revised Unabridged Dictionary · 1913

Wetness

Wetness , noun

1.
The quality or state of being wet; moisture; humidity; as, the wetness of land; the wetness of a cloth.
2.
A watery or moist state of the atmosphere; a state of being rainy, foggy, or misty; as, the wetness of weather or the season.

Wetness generally implies more water or liquid than is implied by humidness or moisture.

3.
Sweat or sweating; -- a euphemism. [Colloquial]