What does antechamber mean?
The definition of antechamber
An”te*cham`ber, n.
Etym: [Cf. F. antichambre.]

1 A chamber or apartment before the chief apartment and leading into it, in which persons wait for audience; an outer chamber. See Lobby.
2 A space viewed as the outer chamber or the entrance to an interior part. The mouth, the antechamber to the digestive canal. Todd & Bowman.