资料来源 : WordNet®

walk-in
     adj : (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" [syn: {walk-in(a)}]

walk-in
     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: {waltz}]
     4: a small room large enough to admit entrance