Liner

n.
  1. One who lines, as, a liner of shoes or clothing.
  2. An airplane or ship belonging to a transportation company;
  3. (Mach.) A thin piece placed between two parts to hold or adjust them, fill a space, etc.; a shim.
  4. A lining{2}.
  5. A slab on which small pieces of marble, tile, etc., are fastened for grinding.
  6. (Baseball) A ball which, when struck, flies through the air in a nearly straight line not far from the ground; also called line drive; as, he hit a sharp liner to right.
  7. A protective envelope for a phonograph record or other object.
  8. A lining; as, a removable coat liner.
  9. Same as eyeliner.