p.pr. & ·vb.n. of tub.
2. tubbing ·noun the forming of a tub; also, collectively, materials for tubs.
3. tubbing ·noun 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., with safety.