(1):
(n.) Something used for wiping, as a towel or rag.
(2):
(n.) A piece generally projecting from a rotating or swinging piece, as an axle or rock shaft, for the purpose of raising stampers, lifting rods, or the like, and leaving them to fall by their own weight; a kind of cam.
(3):
(n.) A rod, or an attachment for a rod, for holding a rag with which to wipe out the bore of the barrel.
(4):
(n.) One who, or that which, wipes.