From Longman Dictionary of Contemporary Englishantechamberan‧te‧cham‧ber /ˈæntɪˌtʃeɪmbə $ -ər/ noun [countable] TBBanteroom
Examples from the Corpus
antechamber• The housekeeper showed them into an antechamber bleak as a dentist's waiting-room.• Outside this office was a smaller room, little more than an antechamber.• An antechamber may be built on to the main egg-chamber.• Paradise it was not; but at least it resembled something like its antechamber.• Such places are the antechamber to the penitentiary.• Two female slaves were tending a small fire in a brazier in the antechamber, and when Burun entered they veiled themselves.• The antechamber which he entered was filled with silent N'pani.• In addition to which, Kenamun had taken care to keep them waiting an hour in an unventilated antechamber before seeing them. 