/wawk"in'/ , adj.
1. of or pertaining to persons who walk into a place from the street, esp. irregularly or without an appointment: walk-in customers; walk-in sales; a walk-in patient.
2. large enough to be walked into: a walk-in kitchen.
n.
3. a person, as a customer, patient, or interviewee, who arrives without an appointment: Many of the clinic's patients are walk-ins who suddenly need help.
4. something large enough to be walked into, as a closet.
5. an assured victory in an election or other contest.
[ 1925-30; adj., n. use of v. phrase walk in ]