n. 1. The forming of a tub; also, collectively, materials for tubs. [ 1913 Webster ]

2. 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. [ 1913 Webster ]

a. Resembling a tub; specifically sounding dull and without resonance, like a tub; wanting elasticity or freedom of sound; as, a tubby violin. [ 1913 Webster ]