dumb waiter

/D AH1 M W EY0 T ER0/
noun
  1. 1

    A small elevator used to move food etc. from one floor of a building to another.

  2. 2

    A table or set of trays on rollers used for serving food.

  3. 3

    A lazy Susan.

Source: https://en.wiktionary.org/wiki/dumb%20waiter, https://en.wiktionary.org/wiki/dumbwaiter