Wiktionary
n. A restroom for girls.
Usage examples of "girls' room".
You have to think hard about sending a kid to school if you can't be certain she won't lose it and decide to wipe her feces all over the walls of the girls' room or slam some boy's head onto the playground because he upset her in some way.
Tom slipped into the girls' room to make sure they were awake, and not going off to sleep again.
They all trooped upstairs to see the girls' room, then back down to collect soda crackers before descending the plank and finding Gabe had ignited the stack of shingles.
I kept searching and came across the other twin under one of the beds in the girls' room.
When I walked out of the girls' room, I wore a huge smile on my face.
She was surprised, but not yet worried, to find the girls' room empty.
Mannering knocked on the wall separating the girls' room from hers, and Dinah went running in to see what the matter was.
There was ai Dolores Potter who talked me into putting it^e were in the girls' room together.