Source : Webster's Revised Unabridged Dictionary (1913)

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.

   2. To wad, as a garment, with warm soft material.

   3. To stitch or sew in lines or patterns.

Source : WordNet®

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