The main difference between Sofa and Chair is that the Sofa is a piece of furniture for seating two or more persons in the form of a bench with armrests and Chair is a piece of furniture for sitting on.
A couch (U.S. English, British English), also known as a sofa, settee (Canadian English and British English), or chesterfield (Canadian English and British English) is a piece of furniture for seating two or three people in the form of a bench, with armrests, that is partially or entirely upholstered, and often fitted with springs and tailored cushions. Although a couch is used primarily for seating, it may be used for sleeping.
In homes, couches are normally found in the family room, living room, den, or the lounge. They are sometimes also found in non-residential settings such as hotels, lobbies of commercial offices, waiting rooms, and bars.
The term couch is predominantly used in Ireland, North America, South Africa and Australia whereas the terms sofa and settee (U and non-U) are generally used in the United Kingdom. The word couch originated in Middle English from the Old French noun couche, which derived from the verb meaning “to lie down”. It originally denoted an item of furniture for lying or sleeping on, somewhat like a chaise longue, but now refers to sofas in general. The word sofa comes from Turkish and is derived from the Arabic word suffa (“wool”), originating in the Aramaic word sippa (“mat”). The word settee comes from the Old English word, setl, which was used to describe long benches with high backs and arms, but is now generally used to describe upholstered seating.
Other terms which can be synonymous with the above definition are chesterfield (Canada), divan, davenport, lounge, and canapé.
A chair is a piece of furniture with a raised surface supported by legs, commonly used to seat a single person. Chairs are supported most often by four legs and have a back; however, a chair can have three legs or can have a different shape. Chairs are made of a wide variety of materials, ranging from wood to metal to synthetic material (e.g. plastic), and they may be padded or upholstered in various colors and fabrics, either just on the seat (as with some dining room chairs) or on the entire chair. Chairs are used in a number of rooms in homes (e.g. in living rooms, dining rooms, and dens), in schools and offices (with desks), and in various other workplaces.
A chair without a back or arm rests is a stool, or when raised up, a bar stool. A chair with arms is an armchair; one with upholstery, reclining action, and a fold-out footrest is a recliner. A permanently fixed chair in a train or theater is a seat or, in an airplane, airline seat; when riding, it is a saddle or bicycle saddle; and for an automobile, a car seat or infant car seat. With wheels it is a wheelchair; or when hung from above, a swing. An upholstered, padded chair for two people is a ‘loveseat’, while if it is for more than two person it is a couch, sofa, or settee; or if is not upholstered, a bench. A separate footrest for a chair, usually upholstered, is known as an ottoman, hassock, or pouffe.
A raised area of a building’s floor, usually covered with carpeting, used for sitting.
A upholstered seat with a raised back and one or two raised ends, long enough to comfortably accommodate two or more people.
An item of furniture used to sit on or in comprising a seat, legs, back, and sometimes arm rests, for use by one person. Compare stool, couch, sofa, settee, loveseat and bench.
“All I need to weather a snowstorm is hot coffee, a warm fire, a good book and a comfortable chair.”
The seating position of a particular musician in an orchestra.
“My violin teacher used to play first chair with the Boston Pops.”
An iron block used on railways to support the rails and secure them to the sleepers, and similar devices.
One of two possible conformers of cyclohexane rings (the other being boat), shaped roughly like a chair.
A distinguished professorship at a university.
A vehicle for one person; either a sedan borne upon poles, or a two-wheeled carriage drawn by one horse; a gig.
to act as chairperson at; to preside over
“Bob will chair tomorrow’s meeting.”
to carry in a seated position upon one’s shoulders, especially in celebration or victory
to award a chair to (a winning poet) at a Welsh eisteddfod
“The poet was chaired at the national Eisteddfod.”