Storey
（重定向自Firstfloor）
A storey (or story in American English) is any level part of a building that could be used by people (for living, work, storage, recreation, etc.). The plurals are "storeys" and "stories" respectively.
The terms "floor", "level", or "deck" can also be used in this sense, except that one may use "ground floor" and "ground level" for the floor closer to what is considered the ground or street level. The words "storey" and "floor" also generally exclude levels of the building that have no roof, even if they are used by people—such as the terrace on the top roof of many buildings.