- a large cask, especially one containing from 63 to 140 gallons (238 to 530 liters).
- any of various units of liquid measure, especially one equivalent to 63 gallons (238 liters). Abbreviation: hhd
- a unit of capacity, used esp for alcoholic beverages. It has several values, being 54 imperial gallons in the case of beer and 52.5 imperial gallons in the case of wine
- a large cask used for shipment of wines and spirits
