powder room
n. countablen. a small bathroom in a house or restaurant that only has a toilet and a sink. It is usually for guests and does not have a shower or bathtub.
n. a small secondary bathroom containing only a toilet and washbasin, primarily intended for guest use in a residential or commercial setting. Commonly used as a polite or slightly formal euphemism for a restroom.
The guests can use the small powder room near the front door.
While the main bathrooms are upstairs, we added a convenient powder room on the ground floor for visitors.
Architects frequently position the powder room adjacent to the foyer, ensuring guest privacy while keeping the more intimate family living quarters entirely separate during social gatherings.
Typically designates a ground-floor facility without bathing fixtures; less clinical and more polite than 'toilet'.