The Collaborative International Dictionary of English v.0.48:

Quilt \Quilt\, v. t. [imp. & p. p. Quilted; p. pr. & vb. n.
   Quilting.]
   1. To stitch or sew together at frequent intervals, in order
      to confine in place the several layers of cloth and
      wadding of which a garment, comforter, etc., may be made;
      as, to quilt a coat. --Dryden.
      [1913 Webster]

   2. To wad, as a garment, with warm soft material.
      [1913 Webster]

   3. To stitch or sew in lines or patterns.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Quilting \Quilt"ing\, n.
   1. The act of stitching or running in patterns, as in making
      a quilt.
      [1913 Webster]

   2. A quilting bee. See Bee, 2.
      [1913 Webster]

   3. The material used for making quilts.
      [1913 Webster]

   4. (Naut.) A coating of strands of rope for a water vessel.
      [1913 Webster]

WordNet (r) 3.0 (2006):

quilting
    n 1: stitching through layers of fabric and a filling so as to
         create a design
    2: a material used for making a quilt, or a quilted fabric