poweredstaircase
nounUK /ˈpaʊəd ˈsteəkeɪs/
US /ˈpaʊərd ˈsterkeɪs/
A powered staircase is a set of stairs that moves by itself to carry people up or down.
Grandma used the powered staircase to reach the second floor without climbing.
OTHER MEANINGS
2. A staircase fitted with a motorized chair lift for people who cannot climb steps.
They installed a powered staircase so their father could get upstairs safely.
3. A set of stairs driven by a motor, such as on a ship or in a factory.
The powered staircase on the ferry folded down when the boat docked.
4. A moving stairway in a public building like a mall or airport.
The powered staircase carried shoppers between the two floors of the store.