A cushion is a soft bag of some ornamental material, stuffed with wool

Wool

Wool is the textile fiber obtained from sheep and certain other animals, including cashmere from goats, mohair from goats, qiviut from muskoxen, vicuña, alpaca, camel from animals in the camel family, and angora from rabbits....

, hair, feather

Feather

Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, on birds and some non-avian theropod dinosaurs. They are considered the most complex integumentary structures found in vertebrates, and indeed a premier example of a complex evolutionary novelty. They...

s, polyester

Polyester

Polyester is a category of polymers which contain the ester functional group in their main chain. Although there are many polyesters, the term "polyester" as a specific material most commonly refers to polyethylene terephthalate...

 staple fiber, non-woven material, or even paper

Paper

Paper is a thin material mainly used for writing upon, printing upon, drawing or for packaging. It is produced by pressing together moist fibers, typically cellulose pulp derived from wood, rags or grasses, and drying them into flexible sheets....

 torn into fragments. It may be used for sitting or kneeling upon, or to soften the hardness or angularity of a chair

Chair

A chair is a stable, raised surface used to sit on, commonly for use by one person. Chairs are most often supported by four legs and have a back; however, a chair can have three legs or could have a different shape depending on the criteria of the chair specifications. A chair without a back or...

 or couch. Cushions and rugs

Carpet

A carpet is a textile floor covering consisting of an upper layer of "pile" attached to a backing. The pile is generally either made from wool or a manmade fibre such as polypropylene,nylon or polyester and usually consists of twisted tufts which are often heat-treated to maintain their...

 can be used temporarily outside, to soften a hard ground

Soil

Soil is a natural body consisting of layers of mineral constituents of variable thicknesses, which differ from the parent materials in their morphological, physical, chemical, and mineralogical characteristics...

. They can be placed on sunloungers and used to prevent annoyances from moist grass

Grass

Grasses, or more technically graminoids, are monocotyledonous, usually herbaceous plants with narrow leaves growing from the base. They include the "true grasses", of the Poaceae family, as well as the sedges and the rushes . The true grasses include cereals, bamboo and the grasses of lawns ...

 and biting insects. Some dialects of English use this word to refer to throw pillow

Throw pillow

A throw pillow, or toss pillow, is a small, decorative type of pillow. Throw pillows are usually placed on sofas or armchairs but are also frequently used on beds and day beds. Throw pillows serve both an aesthetic and a functional purpose. Decorative pillows are commonly used to tie in color...

s as well.

The cushion is a very ancient article of furniture

Furniture

Furniture is the mass noun for the movable objects intended to support various human activities such as seating and sleeping in beds, to hold objects at a convenient height for work using horizontal surfaces above the ground, or to store things...

; the inventories of the contents of palace

Palace

A palace is a grand residence, especially a royal residence or the home of a head of state or some other high-ranking dignitary, such as a bishop or archbishop. The word itself is derived from the Latin name Palātium, for Palatine Hill, one of the seven hills in Rome. In many parts of Europe, the...

s and great houses in the early Middle Age

Middle age

Middle age is the period of age beyond young adulthood but before the onset of old age. Various attempts have been made to define this age, which is around the third quarter of the average life span of human beings....

s constantly made mention of them. Cushions were then often of great size, covered with leather

Leather

Leather is a durable and flexible material created via the tanning of putrescible animal rawhide and skin, primarily cattlehide. It can be produced through different manufacturing processes, ranging from cottage industry to heavy industry.-Forms:...

, and firm enough to serve as a seat, but the steady tendency of all furniture has been to grow smaller with time.

Cushions were, indeed, used as seats at all events in France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 and Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 at a very much later period, and in Saint-Simon

Louis de Rouvroy, duc de Saint-Simon

Louis de Rouvroy commonly known as Saint-Simon was a French soldier, diplomatist and writer of memoirs, was born in Paris...

's time we find that in the Spanish court they were still regarded as a peculiarly honourable substitute for a chair. In France, the right to kneel upon a cushion in church behind the king was jealously guarded and strictly regulated, as we learn again from Saint-Simon. This type of cushion was called a carreau, or square. When seats were rude and hard, cushions may have been a necessity; they are now one of the minor luxuries of life.

Decorative

Decorative cushions are likely to have a fancy cover material which are patterned style

Fashion

Fashion, a general term for a currently popular style or practice, especially in clothing, foot wear, or accessories. Fashion references to anything that is the current trend in look and dress up of a person...

 and generally used to decorate a couch

Couch

A couch, also called a sofa, is an item of furniture designed to seat more than one person, and providing support for the back and arms. Typically, it will have an armrest on either side. In homes couches are normally found in the family room, living room, den or the lounge...

 or chair

Chair

A chair is a stable, raised surface used to sit on, commonly for use by one person. Chairs are most often supported by four legs and have a back; however, a chair can have three legs or could have a different shape depending on the criteria of the chair specifications. A chair without a back or...

. The modern trends of interior designs mean that now cushions are available with retro

Retro

Retro is a culturally outdated or aged style, trend, mode, or fashion, from the overall postmodern past, that has since that time become functionally or superficially the norm once again. The use of "retro" style iconography and imagery interjected into post-modern art, advertising, mass media, etc...

patterns and odd shapes and sizes.