Humidity \Hu*mid"i*ty\, n. [Cf. F. humidit['e].]

Moisture; dampness; a moderate degree of wetness, which is perceptible to the eye or touch; -- used especially of the atmosphere, or of anything which has absorbed moisture from the atmosphere, as clothing.

Note: In hygrometrical reports (as of the United States Signal Service) complete saturation of the air is designated by Humidity 100, and its partial saturation by smaller numbers.

Source: Webster's Revised Unabridged Dictionary (1913)