The word "vat" refers to a large container or tank used for holding liquids, often in industrial or commercial settings. Vats are commonly employed in processes like fermentation, brewing, or dyeing, where substantial volumes of liquid materials are required.
The word "vat" derives from the Middle English term "vat," which comes from the Old Norse word "vǫtt," meaning a container or vessel. Its usage has evolved, but it has consistently referred to large holding vessels throughout history.