DAY-BED, a small type of French couch bed, intended to serve as a bed at night and as a sofa during the day. The standard day-bed is narrow, with foot and head pieces identical in size and appearance. Because of the convenience of its size the day bed has come into wide use in small apartments where every effort must be made to conserve space. It is especially popular in the large cities of the.United States. The low and symmetrical head and foot pieces give it the appearance of a divan, thus serving to conceal to some degree the fact that the living-room in which it appears is converted at night into a bedroom.