/ Dictionary / Index S specific humidity: Meaning and Definition of Find definitions for: specif'ic humid'ity Pronunciation: [key] the ratio of the mass of water vapor in air to the total mass of the mixture of air and water vapor. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. specific heat specific impulse Related Content Daily Word Quiz: anecdote Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language