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Definition of dumb waiter noun from the Oxford Advanced Learner's Dictionary

dumb waiter

noun
 
/ˌdʌm ˈweɪtə(r)/
 
/ˌdʌm ˈweɪtər/
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  1. a small lift for carrying food and plates from one floor to another in a restaurant
See dumb waiter in the Oxford Advanced American Dictionary
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