Wiktionary
ladies' room
n. A restroom for women.
WordNet
ladies' room
n. a woman's restroom in a public (or semi-public) building [syn: powder room]
Usage examples of "ladies' room".
Tim glanced past him at Willy, who was disappearing around the door to the ladies' room.
Tristan Dit ton would insist on accompanying her to the ladies' room.
At this moment the former procession issued from the ladies' room.
The moment she was launched into the ladies' room he rushed back up, walked over to Zeppelin Tung who was near them.