n. The operation of filling the seams of vessels with oakum, to prevent penetration of water. The oakum is forced below the surface, and the space outside of it is filled with melted pitch.n. In carpentry, a dovetail tenon-and-mortise joint by which cross-timbers are secured together, much used for fixing the tie-beams of a roof, or the binding-joists of a floor, down to the wall-plates.n. The copying of a picture or design by means of tracing.