American English

Definition of restroom noun from the Oxford Advanced American Dictionary

 

restroom

 noun
noun
NAmE//ˈrɛstrum//
 
, NAmE//ˈrɛstrʊm//
 
(also rest room)
 
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a room with a toilet in a public place, such as a theater or restaurant
See the Oxford Advanced Learner's Dictionary entry: restroom