staircase
n. B1 Intermediate Oxford US //ˈstɛɹˌkeɪs// UK //stˈeəkeɪs// stair·case
n. a set of stairs inside a building that lets you walk from one floor to another. Staircases usually have a handrail to hold on to for support.
n. a structure containing a set of steps for passing from one level of a building to another, often including railings.
The old house has a creaky wooden staircase.
Be careful walking down the spiral staircase; the steps are quite narrow.
Sunlight from the tall window illuminated the dust motes dancing in the air above the grand marble staircase.
Middle English stair + case, attested around 1620. The two elements have held their shape in English for four centuries.