noun
restroom
REHST-room
noun
1
A public toilet, especially one in a shop, office, or other building.
"Can you tell me where the restroom is?"
How to Use Restroom
Learner’s notesIn plain EnglishA public bathroom.
UK vs US
Chiefly American; British English usually says "toilet" or "loo," and "public convenience" for shared ones.
Common pairings
public restroom
restroom sign
Word Forms
restrooms plural
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Etymology
Compound of rest + room; the term began as a polite euphemism for a lavatory.