walk-in

1. A facility or room which may be walked into:

   A relatively small room (such as a closet or pantry) or refrigerator or freezer that is spacious enough to walk into.

   a small room large enough to admit entrance

2. A relatively larger room or (especially) an apartment that is entered directly, not via an intervening passage or lobby.

   a walk-in bathroom, a walk-in apartment, lived in a walk-in on Lime Street

3. A facility or an event that principally handles customers who do not have an appointment.

   Most teen clinics are walk-ins.

   An increasing demand for skills in niche technologies coupled with higher attrition have prompted these software services firms to organise walk-ins for technology talent too.

   person who walks in without having an appointment

4. A facility accessed on foot rather than by car, usually contrasted to drive-in.

5. Someone who walks in (to a place, etc):

   A customer, job applicant or similar who visits a restaurant, medical facility, car dealership, etc. without a reservation, appointment, or referral.

6. A defector (or similar) who walks into an embassy (etc) unannounced.

7. A demonstration or protest in which the participants assemble outside a facility, gain media exposure, and enter the facility in unison.

8. A person whose original soul has departed the body and been replaced with another.

9. A headmate (fictive, factive, or neither) who shows up in a system fully formed.

regular