\Pack"ing\, n.
1. The act or process of one who packs.
2. Any material used to pack, fill up, or make close.
   Specifically (Mach.): A substance or piece used to make a
   joint impervious; as:
   (a) A thin layer, or sheet, of yielding or elastic
       material inserted between the surfaces of a flange
       joint.
   (b) The substance in a stuffing box, through which a
       piston rod slides.
   (c) A yielding ring, as of metal, which surrounds a piston
       and maintains a tight fit, as inside a cylinder, etc.
3. (Masonry) Same as {Filling}. [Rare in the U. S.]
4. A trick; collusion. [Obs.] --Bale.
{Cherd packing} (Bridge Building), the arrangement, side by
   side, of several parts, as bars, diagonals, a post, etc.,
   on a pin at the bottom of a chord. --Waddell.
{Packing box}, a stuffing box. See under {Stuffing}.
{Packing press}, a powerful press for baling cotton, wool,
   hay, etc.
{Packing ring}. See {Packing}, 2
   (c), and Illust. of {Piston}.
{Packing sheet}.
   (a) A large cloth for packing goods.
   (b) A sheet prepared for packing hydropathic patients.