Pronunciation: ' wo ̇ k- ˌ in
Function: adjective
Date: 1926
1 : large enough to be walked into <a walk-in closet>
2 : arranged so as to be entered directly rather than through a lobby <a walk-in apartment>
3 a : being a person who walks in without an appointment <a walk-in blood donor> b : of, relating to, or intended for such persons <a walk-in clinic>