A couch, also known as a sofa, settee, chesterfield, or davenport, is a cushioned piece of furniture that can seat multiple people. It is commonly found in the form of a bench with upholstered armrest
A three-cushion couch in an office lobby
Loriot's sofa at the Deutsche Kinemathek museum, 2012
A chaise longue is an upholstered sofa in the shape of a chair that is long enough to support the legs of the sitter. For the unupholstered outdoor furniture see sunlounger.
Couch
…Bean bag chair Chaise longue, a similar elongated piece intended for a single person Couch potato…
A chaise longue sofa
Chaise longue (Klinai) in a 4th-century Roman manuscript