What does vat mean?
A vat is a large container, usually one used to hold, ferment, steep, or process liquids and other materials. You may encounter the word in descriptions of breweries, wineries, food production, tanning, dyeing, and chemical works, where a vat can be an essential part of the manufacturing process. The word can also function as a verb: to “vat” something means to place it in a vat or steep it there. “Vat” generally conveys a sense of scale, industry, and practical processing rather than an ordinary household container. Although it is used in both British and American English, the associated industries and vocabulary may differ by region. The word is useful because it names both the physical container and, figuratively in some descriptions, the process of immersion or preservation carried out within it.
A large container used for holding, fermenting, steeping, or otherwise processing liquids or other materials.
"A large fermentation vat stood beside the brewery’s loading bay."
Often associated with industrial, commercial, or food-production processes.
To place something in a vat, especially to steep or process it in liquid.
"The hides were vatted overnight before being removed for further treatment."
This use is specialized and occurs mainly in industrial and technical contexts.
Use “vats” for multiple containers or for the plural form of the noun.
"The factory has several cooling vats on its lower level."
The word travelled from a literal container to a verb meaning “to soak or store in one.”
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does vat come from?
The word comes through Middle English from Old French vat, ultimately from Latin vas, meaning “vessel” or “container.” The noun is the older and primary form, while the verb developed from the idea of placing something in such a vessel. The same Latin root is reflected in English words such as vessel, vascular, vase, and the anatomical term vas.
Related word forms
How vat is actually used
The noun is neutral but tends to suggest a container larger or more specialized than an ordinary bucket or jar. It is especially common in brewing, winemaking, food production, tanning, dyeing, and chemical processing. The verb is more specialized and is mainly used in technical or industrial contexts.
Easily confused with vat
A vat is a large container, whereas a vet is a doctor who treats animals.