What is "staircases"

Usage examples of "staircases".

Bertuccio made amends, however, by loading the ante-chambers, staircases, and mantle-pieces with flowers.

I mean, when people put up staircases and other people come tumbling down them, the insurance people generally want to know why.

From the rooms of Sir Alastair Digby-Vane-Trumpington, two staircases away, came a confused roaring and breaking of glass.