antechamber

n. hall; reception room; anteroom

An antechamber is a smaller room or vestibule serving as an entryway into a larger one. The word is formed of the Latin ante camera, meaning "room before."
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Noun
1. a large entrance or reception room or area
(synonym) anteroom, entrance hall, hall, foyer, lobby, vestibule
(hypernym) room
(hyponym) narthex
(part-holonym) building, edifice

(n.)
A space viewed as the outer chamber or the entrance to an interior part.
  

(n.)
A chamber or apartment before the chief apartment and leading into it, in which persons wait for audience; an outer chamber. See Lobby.
  

n.
باہر کا کمرا , ڈيوڑھي , دہليز , پولي