n A stump or base of a branch that has been lopped off; a short branch, or a sharp or rough branch; a knot; a protuberance.
n A tooth projecting beyond the rest; a broken or decayed tooth.
n A tree, or a branch of a tree, fixed in the bottom of a river or other navigable water, and rising nearly or quite to the surface, by which boats are sometimes pierced and sunk.