dressing room

noun4

1. •
   A room used for dressing or changing clothes.

   • The storeroom is not a suitable dressing room. A separate room is needed where workers may change from street clothes to uniforms and where they may keep their personal belongings. — 1949
2. •
   A small room adjoining a domestic bedroom where people may dress or undress in privacy.

   • I received a note from my Lady Primrose, who desired to see me immediately. As soon as I waited on her, she led me into her dressing-room, and presented me to―― — 1858
3. •
   A room in a theatre or other performance venue in which performers may change costumes and apply makeup.
4. •
   (UK) A changing room at a recreational or sports venue.

   • Going into a dressing-room full of established players was not easy. It was like Lancashire all over again only more so. — 2005