walk-in
noun
Definitions
A facility or room which may be walked into:
Someone who walks in (to a place, etc):
A demonstration or protest in which the participants assemble outside a facility, gain media exposure, and enter the facility in unison.
A person whose original soul has departed the body and been replaced with another.
adjective
Definitions
That may be walked into:
(of a thief or theft) Gaining access through unlocked doors.