Alternative spelling of backstairs

An impossible loop of endlessly ascending and descending stairs, or an optical illusion appearing to depict such a loop.

(archaic) Upstairs; in or on an upper floor.

(archaic) The part of a building above the ground level.

stairs leading to a trapdoor

A fire escape.

A fire escape.

plural of pair of stairs

A flight of stairs that is constructed to deliberately disrupt the natural strides of people walking or running on them.

plural of missing stair