n. 1. Scandinavian liquor usually flavored with caroway seeds. Syn. -- aquavit [ WordNet 1.5 ]
n. [ Russ. kvas'. ] A thin, sour beer, made by pouring warm water on rye or barley meal and letting it ferment, -- much used by the Russians. [ written also quas and quass. ] [ 1913 Webster + PJC ]