1.A vessel for drawing up water from a well, or for catching, holding, or carrying water, sap, or other liquids. "The old oaken bucket, the iron-bound bucket, The moss-covered bucket, which hung in the well."
2.A vessel (as a tub or scoop) for hoisting and conveying coal, ore, grain, etc.
3.(Mach.) One of the receptacles on the rim of a water wheel into which the water rushes, causing the wheel to revolve; also, a float of a paddle wheel.
4.The valved piston of a lifting pump.
5.(Mach.) One of vanes on the rotor of a turbine.