Source : Webster's Revised Unabridged Dictionary (1913)

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.

   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.]

   3. To harden, as hat bodies, by felting.

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

   {Planked shad}, shad split open, fastened to a plank, and
      roasted before a wood fire.

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.

   2. The act of splicing slivers. See {Plank}, v. t., 4.

Source : WordNet®

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