[1] : 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
see also:
quilted quilting 

[2] : WordNet (r) 2.0

quilted
     adj : made of layers of fabric held together by patterned
           stitching

Quilted >> Q Words
Quilted, definition of term: Quilted
quilted_pag1.html