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.
(of a store, restaurant, apartment, etc.) located below the level of the sidewalk: a popular walk-down nightclub in Greenwich Village.
Origin of walk-down
1905–10, Americanism; noun, adj. use of verb phrase walk down
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019