Stairs; a set of steps connecting different floors used for going up and down.
駅の階段を上ると改札がある。
If you go up the station stairs, you'll find the ticket gate.
小さな子供は階段で転ばないように気をつけてください。
Be careful that small children don't fall on the stairs.
非常時はエレベーターではなく階段を使って避難してください。
In an emergency, use the stairs to evacuate rather than the elevator.
2階へは階段で行った方が早い。
It's faster to go to the second floor by stairs.