cask / kask/ • n. a large barrellike container made of wood, metal, or plastic, used for storing liquids, typically alcoholic drinks. ∎  the quantity of liquid held in such a container: a cask of cider.

cask hooped wooden vessel; †casket; †helmet. XV. — F. casque or Sp. casco helmet, CASQUE. The earliest and prevailing sense was prob. imported with the wine trade and depended on provincial uses of the S. French or Sp. region, where, however, the only recorded sense is ‘helmet’.