1. a large container, as a tub or tank, used for storing or holding liquids: a wine vat.
  2. Chemistry.
    1. a preparation containing an insoluble dye converted by reduction into a soluble leuco base.
    2. a vessel containing such a preparation.

verb (used with object), vat·ted, vat·ting.

  1. to put into or treat in a vat.

  1. value-added tax.

  1. Vatican.


  1. a large container for holding or storing liquids
  2. chem a preparation of reduced vat dye

verb vats, vatting or vatted

  1. (tr) to place, store, or treat in a vat

abbreviation for (in Britain)

  1. value-added tax: a tax levied on the difference between the cost of materials and the selling price of a commodity or service

abbreviation for

  1. Vatican

early 13c., southern variant (see V) of Old English fæt “container, vat,” from Proto-Germanic *fatan (cf. Old Saxon, Old Norse fat, Old Frisian fet, Middle Dutch, Dutch vat, Old High German faz, German faß).

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