A large tub, vessel, or cistern, especially one for holding liquors in an immature state, as chemical preparations for dyeing or for tanning leather, A measure for liquids, and also a dry measure; especially, a liquid measure in Belgium and Holland, corresponding to the hectoliter of the metric system, which contains 22.01 imperial gallons, or 26.4 standard gallons in the United States, a large open vessel for holding or storing liquids, verb_ transitive To blend (wines or spirits) in a vat, transitive verb_ To put into or treat in a vat