,noun, verb, vat⋅ted, vat⋅ting.| 1. | a large container, as a tub or tank, used for storing or holding liquids: a wine vat. |
| 2. | Chemistry.
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| 3. | to put into or treat in a vat. |

| value-added tax n. Abbr. VAT A tax on the estimated market value added to a product or material at each stage of its manufacture or distribution, ultimately passed on to the consumer. |
| VAT abbr. value-added tax |
| VAT value-added tax |