a flight or flights of steps together with any landings and parts of public halls through which it is necessary to pass in going from one level thereof to another

From the Anglo-Saxon verb, “stigan”, Middle English, from Old English “stæger” and meaning to climb or ascend. A step or a set of steps, or a run of steps enabling a person to ascend or descend from one level to another. A series of stepping-stones, shelves, or treads that enables a person to climb to a higher elevation or level with reduced effort.

1. A flight of steps; a staircase. 2. A single step, usually in a series of steps, leading from one level of floor to another.