powder room

noun4

1. •
   A room used to store gunpowder, particularly (historical) on a ship equipped with cannon.

   • Are you insane? Don't take a candle into the powder room!
2. •
   Synonym of half bath: a small room with a toilet and sink but no bathtub or shower.

   • The house — four stories high and 22 feet wide — has five bedrooms, three full bathrooms and a powder room, along with three fireplaces and a finished basement with a gym and laundry. — 2025
3. •
   (euphemistic) Synonym of ladies' room: a lavatory intended for use by women.

   • If you'll excuse me, I need to visit the powder room to see a man about a dog.
4. •
   (historical) A room used to powder hair and wigs.