An elderly woman plays an upright piano.
upright piano definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a piano with strings set vertically in a rectangular body
upright piano definition by American Heritage Dictionary
A piano having the strings mounted vertically in a rectangular case with the keyboard at a right angle to the case.