/ Dictionary / Index H haust.: Meaning and Definition of Find definitions for: haust. Pronunciation: [key] (in prescriptions) draught. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Haussmann haustellate Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language