Section 2(1)(g) in Kerala Municipality Building Rules, 1999
(g)"apartment" means a part of a building intended for any type of independent use including one or more rooms or enclosed spaces located on one or more floors or parts thereof in a building, intended to be used for residential purposes and with a direct exit to a public street, road or highway or to a common area, leading to such street, road or highway. This word is synonymous with residential flat;