staircase
- A set of stairs and its surrounding structure, often including a balustrade, that provides a means of access between different levels of a building. nounThe grand staircase in the mansion was made of marble and had intricate carvings.She ascended the staircase quietly, trying not to wake anyone.
- A flight of steps with a handrail, typically indoors, that connects different floors within a building. nounThe fire escape was a metal staircase attached to the outside of the building.He tripped on the staircase and sprained his ankle.