1 Covered place of entrance and exit attached to a building and projecting in front of its main mass, such as the south porch of a medieval church, often with a room over it.
2 Interior volume serving as a vestibule.
3 Transept or side-chapel in a church.
4 Cloister, colonnade, Galilee, narthex, portico, stoa, or verandah (all with columns). A columned porch or portico usually has a pediment and resembles a temple-front.