Real Dictionary

quilt
countable noun: A quilt is a thin cover filled with feathers or some other warm, soft material, which you put over your blankets when you are in bed.
countable noun: A quilt is the same as a duvet.

quilt in American English
a bedcover made of two layers of cloth filled with down, cotton, wool, etc. and stitched together in lines or patterns to keep the filling in place
to make or stitch as or like a quilt
intransitive verb: to make quilts or quilted work
noun: a coverlet for a bed, made of two layers of fabric with some soft substance, as wool or down, between them and stitched in patterns or tufted through all thicknesses in order to prevent the filling from shifting
transitive verb: to stitch together (two pieces of cloth and a soft interlining), usually in an ornamental pattern

quilt in British English
to stitch together (two pieces of fabric) with (a thick padding or lining) between them
noun: a thick warm cover for a bed, consisting of a soft filling sewn between two layers of material, usually with crisscross seams