A lining of timber or metal around the shaft of a mine; especially, a series of cast-iron cylinders bolted together, used to enable those who sink a shaft to penetrate quicksand, water, etc
An open wooden vessel formed with staves, bottom, and hoops; a kind of short cask, half barrel, or firkin, usually with but one head, used for various purposes
A tub is a deep container of any size. He peeled the paper top off a little white tub and poured the cream into his coffee A tub of something is the amount of it contained in a tub. She would eat four tubs of ice cream in one sitting
{i} bathtub; bowl, basin; object resembling a basin; volume that can be held by a tub; old or slow boat; band on a mast for attaching certain nautical equipment (Nautical); short and fat person (Slang)
A position in which the legs are bent and together, the feet and knees are at the surface and parallel to it, the thighs are perpendicular, and the face is at the surface, with the head in line with trunk