A bathroom, restroom or washroom is a room, typically in a home or other residential building, that contains either a bathtub or a shower (or both). The inclusion of a wash basin is common. In some parts of the world e.g. India, a toilet is typically included in the bathroom; in others, the toilet is typically given a dedicated room separate from the one allocated for personal hygiene activities. In the United States, the word 'bathroom' is often used to refer to any room (i.e a toilet, or restroom) that contains a toilet, regardless of the inclusion of a bath or shower.
Historically, bathing was often a collective activity, which took place in public baths. In some countries, the shared social aspect of cleansing the body is still important, for example with sento in Japan and the "Turkish bath" (also known by other names) throughout the Islamic world.