The Collaborative International Dictionary of English v.0.48:

Quilt \Quilt\, n. [OE. quilte, OF. cuilte, L. culcita ? bed,
   cushion, mattress. Cf. 2d Counterpoint, Cushion.]
   Anything that is quilted; esp., a quilted bed cover, or a
   skirt worn by women; any cover or garment made by putting
   wool, cotton, etc., between two cloths and stitching them
   together; also, any outer bed cover.
   [1913 Webster]

         The beds were covered with magnificent quilts.
                                                  --Arbuthnot.
   [1913 Webster]

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]

WordNet (r) 3.0 (2006):

quilt
    n 1: bedding made of two layers of cloth filled with stuffing
         and stitched together [syn: quilt, comforter,
         comfort, puff]
    v 1: stitch or sew together; "quilt the skirt"
    2: create by stitching together

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "quilt":
   afghan, bed linen, bedclothes, bedcover, bedding, bedsheet,
   bedspread, blanket, buffalo robe, case, clothes, comfort,
   comfortable, comforter, contour sheet, counterpane, cover,
   coverlet, coverlid, eiderdown, fitted sheet, lap robe, linen,
   patchwork quilt, pillow slip, pillowcase, puff, robe, rug, sheet,
   sheeting, slip, spread