1.NounA 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.
"He sat on his porch, waiting for his friend to come over."
2.NounA portico; a covered walk.
3.NounThe platform outside the external hatch of a spacecraft.