Stair vs Staircases - What's the difference?

As nouns the difference between stair and staircases

is that stair is a single step in a staircase while staircases is .

(en noun)

A single step in a staircase.

A series of steps, a staircase.

*{{quote-book, year=1899, author=(Hughes Mearns)

, title= , passage=Yesterday, upon the stair / I met a man who wasn’t there / He wasn’t there again today / I wish, I wish he’d go away …}}

* Stairs'' and ''stair are used to refer to a single staircase, mostly interchangeably in the UK.

* above-stairs * upstairs * downstairs * stair-stepping * staircase * stairs * stairway * stairwell