A couch is a generic term in North America and Australia, for an item of furniture designed to seat more than one person. Typically it will have an armrest on either side. Couches are normally found in the family room, living room, den or the lounge. They are covered in a variety of textiles or in leather.
Other terms synonymous with the above definition of couch are sofa (derived from the Arabic word "suffah") and settee.