The Pillowcase

A pillow is a support for the head or other parts of the body, used while sleeping on a bed, or, in the United State, for the body as used on a couch or chair ( which  English would call a cushion ).
In contemporary western culture pillows consist of a fabric envelope which contains a soft stuffing, which may range from down feathers to synthetic foam. In other cultures, pillows have been made of wood or stone. Bed pillows are typically covered with a cloth pillowcase. Pillow used in a living room typically have a cloth cover.
There are also Throw pillows ( also called toss pillows, and in the UK, pillow shams ), which are pillows that are mainly decorative and not designed for support or comfort. A cushion is a soft bag filled with air or padding such as feathers or foam rubber.  In the united Kingdom, pillows used on chairs, sofas, or daybeds are called cushion, with the word pillow used only for pillows on a bed. In the UK, cushion  are usually square, while bed pillow are oblong.



                                                                                                                               Wikipedia