NOUN (3)

1. planks collectively; a quantity of planks;

2. (nautical) a covering or flooring constructed of planks (as on a ship);

3. the work of covering an area with planks;

The Collaborative International Dictionary of English v.0.48:

Plank \Plank\, v. t. [imp. & p. p. Planked; p. pr. & vb. n.
   Planking.]
   1. To cover or lay with planks; as, to plank a floor or a
      ship. "Planked with pine." --Dryden.
      [1913 Webster]

   2. To lay down, as on a plank or table; to stake or pay cash;
      as, to plank money in a wager. [Colloq. U.S.]
      [1913 Webster]

   3. To harden, as hat bodies, by felting.
      [1913 Webster]

   4. (Wooden Manuf.) To splice together the ends of slivers of
      wool, for subsequent drawing.
      [1913 Webster]

   Planked shad, shad split open, fastened to a plank, and
      roasted before a wood fire.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Planking \Plank"ing\, n.
   1. The act of laying planks; also, planks, collectively; a
      series of planks in place, as the wooden covering of the
      frame of a vessel.
      [1913 Webster]

   2. The act of splicing slivers. See Plank, v. t., 4.
      [1913 Webster]

WordNet (r) 3.0 (2006):

planking
    n 1: planks collectively; a quantity of planks
    2: (nautical) a covering or flooring constructed of planks (as
       on a ship)
    3: the work of covering an area with planks

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "planking":
   bank, beam, billet, board, boarding, border, broadside, cheek,
   chop, clapboard, coast, cord, cordwood, deal, driftwood, firewood,
   flank, hand, handedness, hardwood, haunch, hip, jowl, laterality,
   lath, lathing, lathwork, log, lumber, many-sidedness,
   multilaterality, panelboard, paneling, panelwork, plank, plyboard,
   plywood, pole, post, profile, puncheon, quarter, shake, sheathing,
   sheathing board, sheeting, shingle, shore, side, sideboard, siding,
   slab, slat, softwood, splat, stave, stick, stick of wood,
   stovewood, temple, three-by-four, timber, timbering, timberwork,
   two-by-four, unilaterality, weatherboard, wood