1.A large vessel, such as a tub, cistern, or barrel, used to hold or store liquids.
2.A large vessel (as a cistern, tub, or barrel) especially for holding liquors in an immature state or preparations for dyeing or tanning.
3.A liquor containing a dye converted into a soluble reduced colorless or weakly colored form that on textile material steeped in the liquor and exposed to the air is converted by oxidation to the original insoluble dye and precipitated in the fiber.
4.A large tank or tub used to hold liquid, especially in industry:.
5.A water-insoluble dye, such as indigo, that is applied to a fabric in a reducing bath which converts it to a soluble form, the colour being obtained on subsequent oxidation in the fabric fibres.