Planing may refer to: Planing (boat) or hydroplaning, a method by which a hull skims over the surface of the water Hydroplaning (tires), a loss of traction caused by a layer of water between the tires and the road surface Using a plane (tool) to smooth a flat surface of a piece of wood Operating a Planer (metalworking) to produce a flat surface Harmonic planing (music), chords that move in parallel motion, thereby eliminating any feeling of harmonic progression Scaling and root planing, the removal of dental plaque Planing (shaping), material removal process See also Planning Plane (disambiguation)