chesterfield
Synonym discussion
Sense: noun/1
For this sense, chesterfield usually points to a sofa with a classic formal look, often leather and deep-buttoned. Sofa is the broad neutral word and works for almost any padded seat with room for more than one person. Couch is more casual in everyday North American speech and often sounds less formal than chesterfield. Settee is a more traditional or slightly old-fashioned word, sometimes suggesting a smaller or tidier piece of furniture. Davenport is now dated in many places and can overlap with old regional naming for sofas. If you are naming the distinctive traditional style, chesterfield is the most exact choice; for general daily use, sofa is usually safer.
Etymology
Chesterfield began as a title and later became the name of objects linked with a particular formal style. English first used it for a well-known sofa design, then also for a fitted overcoat with a velvet collar. In both senses, a family title turned into a common noun for a recognizable look.
First known use
1852
1852, in the meaning defined at sense 1