dumb waiter
US /ˈdʌmˌweɪ.tər/
UK /ˈdʌmˌweɪ.tər/
1.
a small elevator or lift, typically in a restaurant or house, used for carrying food or other goods between floors.
:
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The chef sent the dishes up to the dining room using the dumbwaiter.
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Our old house has a small dumbwaiter that goes from the kitchen to the second floor.