stairwell

or stair well

[ stair-wel ]
/ ˈstɛərˌwɛl /

noun

the vertical shaft or opening containing a stairway.

Origin of stairwell

First recorded in 1915–20; stair + well2

Example sentences from the Web for stairwell

British Dictionary definitions for stairwell

stairwell
/ (ˈstɛəˌwɛl) /

noun

a vertical shaft or opening that contains a staircase