A vertical shaft around which a staircase has been built.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "stairwell" in a sentence
"Recently Barg discovered that the man who called out to him and the others in the stairwell is a supervisor at Baseline Financial."
"A pristine stairwell is one more step toward her objective: a data-driven, no-excuses haven for learning, where all children excel and shoestrings never come undone."
"And now the stairwell is painted and timprov's Hidden Falls picture is hung in it, and I am pleased."