noun

1. Short for half bathroom.

noun

1. A room belonging to some or all women, particularly:

Synonyms: women's room

noun

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

   “Are you insane? Don't take a candle into the powder room!”

2. A room used to powder hair and wigs.

Synonyms: magazine, powder, powder closet