(1):
(n.) A flooring laid over a floor to bring it up to some height or level.
(2):
(n.) A floor under the stage, from which various contrivances, as traps, are worked.
(3):
(n.) Same as Entresol.
(4):
(n.) A partial story which is not on the same level with the story of the main part of the edifice, as of a back building, where the floors are on a level with landings of the staircase of the main house.