noun
A large tub, such as is used for making wine or for tanning.
A square, hollow place on the back of a calcining furnace, where tin ore is laid to dry.
(Roman Catholicism) A vessel for holding holy water.
(dated) A liquid measure and dry measure; especially, a liquid measure in Belgium and Holland, corresponding to the hectolitre of the metric system, which contains 22.01 imperial gallons, or 26.4 standard gallons in the United States.
verb
(transitive) To put into a vat.
(transitive) To blend (wines or spirits) in a vat; figuratively, to mix or blend elements as if with wines or spirits.
adjective
Designating a vat dye.