Flat

Flat, a story or floor of a building, especially when fitted up as a separate residence for a family; four, six, or more such dwellings (often only half-floors) being approached by a common stair. This tenement system is much more common in Scotland and on the Continent than in England, though of late years it has been largely adopted in London, both in the richer and in the poorer districts. In New York and other large American towns, besides the older tenement houses, there are more expensive modern flats, often fitted with conveniences unknown in similar houses in Europe.