건물 내에서 계단이 설치되어 있는 수직의 빈 공간
A vertical shaft or opening in a building that contains a staircase.
예문:
"The fire department instructed everyone to use the stairwell instead of the elevator."
"Echoes of laughter drifted up the stairwell from the lobby below."
"The walls of the stairwell were painted a bright yellow to improve visibility."