walk-upPronunciation: (wôk'up"), [key]
an apartment above the ground floor in a building that has no elevator.
a building, esp. an apartment house, that has no elevator.
located above the ground floor in a building that has no elevator.
having no elevator.
accessible to pedestrians from the outside of a building: a walk-up teller's window at a bank.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.