A mezzanine; an intermediate floor in a building, typically resembling a balcony; most often, the floor immediately above the ground floor and below a higher floor.
A covered entrance to a building, whether taken from the interior, and forming a sort of vestibule within the main wall, or projecting without and with a separate roof. A porch often has chair(s), table(s) and swings.
A portico; a covered walk.
The platform outside the external hatch of a spacecraft.