The term 'floor in a building' can be summarized as a STOREY, which is a level of a building between the ground and roof. A STOREY is typically composed of rooms, hallways, and other spaces that are all on the same level. It is usually the same height as other storeys in the building, although some buildings may have taller or shorter storeys. Storeys are often numbered from the ground up, with the ground floor being the first STOREY.