noun
a flight of stairs or a flight of steps (Freq. 15)
• Syn: ↑steps
• Usage Domain: ↑plural, ↑plural form
• Hyponyms: ↑ladder
* * *
◊ 'step'
A step is a raised flat surface which you put your feet on to move to a different level.
Mind the step.
She was sitting on the top step.
A series of steps, for example on a steep slope or on the outside of a building, is called a flight of steps.
...a flight of concrete steps.
◊ 'stairs'
A series of steps inside a building which you use to get from one floor to another is called stairs or a staircase.
I was running up and down the stairs.
There was a large hall with a big staircase winding up from it.
Useful english dictionary. 2012.