2.American EnglishAmE a room or area in a store where you can try on clothes 〔商店里的〕试衣室SYN British English changing room
3.DHHa small room next to a bedroom in some houses where you can get dressed 〔卧室旁边的〕更衣室,梳妆室
Examples from the Corpus
dressing room• Julie Rose would be there and would return the yellowshoes I'd left in a dressing room two weeks ago.• Bivins listened to their music in his dressing room and a few months later signed them up.• He spent the interval just sitting in his dressing room, gathering his strength for the next act.• So why was he all smiles in his dressing room after the fight?• He went back into the dressing room, took a shot and came back to play.