An "over-covering" on a bed made with a fabric shell that is filled with an insulating material of some kind. Comforters can be functional (e.g. down comforters) or a fashion article (e.g. a synthetic filled comforter with a printed design on the shell) Also called a "duvet"
Your comforter should cover your mattress, but not the boxspring. A comforter is generally used with a bedskirt that covers the boxspring and hangs to the floor. Since a comforter isnâ€(tm)t long enough cover your bed pillows, most people use shams.
A fiber filled or quilted bed covering which spreads over top of mattress but does not cover pillows or hang all the way to the floor; often paired with a bed skirt and pillow shams. A comforter is smaller than a bedspread and larger than a coverlet.