/ Dictionary / Index Q quass: Meaning and Definition of Find definitions for: quass Pronunciation: (kväs, kwäs), [key] kvass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. quasquicentennial quassia Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language