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. "I a winding stair found." Chaucer's Dream. 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 stars (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.

STAIRCASE
Stair"case`, n.

Defn: A flight of stairs with their supporting framework, casing,
balusters, etc.
To make a complete staircase is a curious piece of architecture. Sir
H. Wotton.
Staircase shell. (Zoöl.) (a) Any scalaria, or wentletrap. (b) Any
species of Solarium, or perspective shell.

STAIRHEAD
Stair"head`, n.

Defn: The head or top of a staircase.

STAIRWAY
Stair"way`, n.

Defn: A flight of stairs or steps; a staircase. "A rude and narrow stairway." Moore.

STAITH
Staith, n. Etym: [AS. stæ a bank, shore, from the root of E. stead.]

Defn: A landing place; an elevated staging upon a wharf for discharging coal, etc., as from railway cars, into vessels.

STAITHMAN
Staith"man, n.