/day"bed'/ , n.
1. a couch that can be used as a sofa by day and a bed by night.
2. a couch, esp. of the 17th or 18th century, in the form of a usually armless chair, with a greatly elongated seat supported by extra legs and a slanted, sometimes hinged, back, used for reclining or sleeping during the day.
[ 1585-95; DAY + BED ]