Longman Dictionary of Contemporary English
dumb waiter
noun
EXAMPLES FROM CORPUS
▪ The kitchen is equipped along old-fashioned lines, and meals reach the dining room via a dumb waiter.
▪ Where design permits, the old-fashioned serving hatch can come in handy: it's the dumb waiter of the less-palatial home.
Wiktionary
dumb waiter
n. (alternative spelling of dumbwaiter English)
Wikipedia
Dumb Waiter
Usage examples of "dumb waiter".
A dumb waiter followed her around, all bright gleaming brass and scrollwork, eager to fulfill her every desire.
Saint-Clair smiled with genuine pleasure and took off his shoes, laying them side by side at the foot of the dumb waiter.
The trousers came next, to be meticulously folded and laid over the protruding arm of the dumb waiter.
And, taking matters into my own hands, I use the quickest method, the dumb waiter, above stairs to make a personal inquiry of this duc as to where his staff might be.