A bed is a piece of furniture which is used as a place to sleep, rest, and relax.[1][2]

Most modern beds consist of a soft, cushioned mattress on a bed frame. The mattress rests either on a solid base, often wood slats, or a sprung base. Many beds include a box spring innersprung base, which is a large mattresssized box containing wood and springs that provide additional support and suspension for the mattress. Beds are available in many sizes, ranging from infantsized bassinets and cribs, to small beds for a single person or adult, to large queen and kingsize beds designed for two people. While most beds are single mattresses on a fixed frame, there are other varieties, such as the murphy bed, which folds into a wall, the sofa bed, which folds out of a sofa, and the bunk bed, which provides two mattresses on two tiers as well as a ladder to access the upper tier. Temporary beds include the inflatable air mattress and the folding camp cot. Some beds contain neither a padded mattress nor a bed frame, such as the hammock. Other beds are made specifically for animals.

Beds may have a headboard for resting against, and may have side rails and footboards (or "footers"). "Headboard only" beds may incorporate a "dust ruffle", "bed skirt", or "valance sheet" to hide the bed frame. To support the head, a pillow made of a soft, padded material is usually placed on the top of the mattress. Some form of covering blanket is often used to insulate the sleeper, often bed sheets, a quilt, or a duvet, collectively referred to as bedding. Bedding is the removable nonfurniture portion of a bed, which enables these components to be washed or aired out.