Source : Webster's Revised Unabridged Dictionary (1913)

Piling \Pil"ing\, n. [See {Pile} a heap.]
   1. The act of heaping up.

   2. (Iron Manuf.) The process of building up, heating, and
      working, fagots, or piles, to form bars, etc.

Piling \Pil"ing\, n. [See {Pile} a stake.]
   A series of piles; piles considered collectively; as, the
   piling of a bridge.

   {Pug piling}, sheet piles connected together at the edges by
      dovetailed tongues and grooves.

   {Sheet piling}, a series of piles made of planks or half logs
      driven edge to edge, -- used to form the walls of
      cofferdams, etc.

Source : WordNet®

piling
     n : a column of wood or steel or concrete that is driven into
         the ground to provide support for a structure [syn: {pile},
          {spile}, {stilt}]