dressing room

US /ˈdres.ɪŋ ˌruːm/
UK /ˈdres.ɪŋ ˌruːm/
"dressing room" picture
1.

a room where actors or other performers get ready for a performance, including changing clothes and applying makeup

:
The actress was in her dressing room preparing for the show.
After the concert, the band relaxed in the dressing room.
2.

a room or area in a store where customers can try on clothes before buying them

:
Please use the dressing room to try on the shirt.
There was a long line for the dressing room during the sale.