The upper storey of a building, surrounded by such a roof
A mansard roof
having two slopes on each side, the lower being steeper than the upper
A portico; a covered walk.
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.
The platform outside the external hatch of a spacecraft.