antechamber
/ˈæntiˌtʃeɪmbər/
noun
- A small room leading into a larger room, often used as a waiting area.
- She paced nervously in the antechamber while her interview was being prepared.
- Guests waited in the antechamber before being invited into the main hall.
- The king's antechamber was decorated with tapestries and gold trim.