1. a mildly alcoholic beverage made from fermented bread, popular in Russia and Eastern Europe

Examples

• The street vendor sold cold kvass from a large barrel.
• She enjoyed the tangy, refreshing taste of homemade kvass.
• Kvass is traditionally made from dark rye bread and water.
• Many Russians drink kvass as a summer refreshment.
• The restaurant served kvass alongside traditional Russian dishes.
• He learned to brew kvass using his grandmother’s recipe.