A couch is generally an upholstered seat for more than one person.
Other names or similar furniture: sofa, lounge chair, loveseat, chaise lounge, settee, divan
Upholstery and stuffing can be made of many different materials. Some common coverings are cloth and leather.
"Coach potatoes" were derived from this piece of furniture, which meant people who spend much of their time on couches, usually watching television.
- size - both space for people to sit and space taken