Stair

n.	1.	One step of a series for ascending or descending to a different level; - commonly applied to those within a building.
	2.	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. Below stairs in the basement or lower part of a house, where the servants are. Flight of stairs the stairs which make the whole ascent of a story. Pair of stairs a set or flight of stairs. - pair, in this phrase, having its old meaning of a set. See Pair, n., 1. Run of stairs (Arch.) a single set of stairs, or section of a stairway, from one platform to the next. Stair rod a rod, usually of metal, for holding a stair carpet to its place. Up stairs See Upstairs in the Vocabulary.

Noun

1.

stair - support consisting of a place to rest the foot while ascending or descending a stairway; "he paused on the bottom step" Synonyms: step

amount, caliber, compass, cut, degree, doorstep, extent, footrest, footstep, grade, height, interval, leap, level, mark, measure, notch, nuance, pas, peg, period, pitch, plane, plateau, point, proportion, range, ratio, reach, remove, rest, riser, round, rundle, rung, scale, scope, shade, shadow, space, spoke, standard, stave, step, step stool, stepping-stone, stint, string, tread