Stairs

Stairs, a stairway, a staircase, a stairwell, or a flight of stairs is a construction designed to bridge a large vertical distance by dividing it into smaller vertical distances, called steps. Stairs may be straight, round, or may consist of two or more straight pieces connected at angles.

Various examples of stairs

Special types of stairs include escalators and ladders. Some alternatives to stairs are elevators (also called lifts), stairlifts, inclined moving walkways, and ramps.[1]