walk-in

(noun) person who walks in without having an appointment. Example: "The emergency room was overrun with walk-ins."

(noun) an operative who initiates his own defection (usually to a hostile country) for political asylum.

(noun) an assured victory (especially in an election). Synonyms: waltz.

(noun) a small room large enough to admit entrance.

(verb) enter by walking. Synonyms: walk in. Example: "She walks in at all hours, as if she lived here."

(adj) (of e.g. closets or refrigerators) extending very far enough back to allow a person to enter. Synonyms: walk-in(prenominal). Examples: "A deep walk-in refrigerator." "Walk-in closets."