- One step of a series for ascending or descending to a different level; -- commonly applied to those within a building.
- A series of steps, as for passing from one story of a house to another; -- commonly used in the plural; but originally used in the singular only."I a winding stairfound." [Chaucer's Dream.]
Etymology: OE. steir steyer, AS. stǣger, from stīgan to ascend, rise. √164. See Sty to ascend