Sentence:  Then everybody once more knelt, and soon the blessing was pronounced. The choir and the clergy trooped out slowly, ..., down the nave to the western <WSD>door</WSD>. ... At a seemingly immense distance the surpliced group stopped to say the last prayer. 
Meaning of the word marked with <WSD> tags:  A (portal) of entry into a building, room, or vehicle, consisting of a rigid plane movable on a (hinge). Doors are frequently made of (wood) or (metal). May have a (handle) to help open and close, a (latch) to hold the door closed(,) and a (lock) that ensures the door cannot be opened without the key.