walk-in
    adj 1: (of e.g. closets or refrigerators) extending very far
           enough back to allow a person to enter; "a deep walk-in
           refrigerator"; "walk-in closets"
    n 1: person who walks in without having an appointment; "the
         emergency room was overrun with walk-ins"
    2: an operative who initiates his own defection (usually to a
       hostile country) for political asylum
    3: an assured victory (especially in an election) [syn: walk-
       in, waltz]
    4: a small room large enough to admit entrance