Boyd’s Bible Dictionary:
(door). In oriental architecture, veranda, colonnade, vestibule (Judg. 3:23; 1 Chron. 28:11; John 10:23). Any passage from street to inner hall (Matt. 26:71).
Strong’s Dictionary of Greek Words:
Transliteration:
proaulion
Meaning:
neuter of a presumed compound of 4253 and 833; a forecourt, i.e. vestibule (alley-way)