/wawk"down'/ , n.
1. a store, living quarters, etc., located below the street level and approached by a flight of steps: It was a dimly lit walk-down optimistically called a garden apartment.
adj.
2. (of a store, restaurant, apartment, etc.) located below the level of the sidewalk: a popular walk-down nightclub in Greenwich Village.
[ 1905-10, Amer.; n., adj. use of v. phrase walk down ]