plural of stair
"The old wooden stairs creaked every time someone walked up to the second floor."
A contiguous set of steps connecting two floors.
In plain English: Stairs are steps you climb up and down to get between different floors of a building.
"We climbed the stairs to get to our apartment on the third floor."
Usage: Use stairs to refer specifically to an indoor structure with multiple connected steps, distinguishing it from outdoor ladders or single-step risers. This term applies only when the path links different levels within a building rather than serving as temporary access equipment.
plural of Stair
"The children played tag on the narrow stairs leading up to the attic."