walk-in Meaning, Definition & Usage

1. noun person who walks in without having an appointment
   
   • the emergency room was overrun with walk-ins
2. noun an operative who initiates his own defection (usually to a hostile country) for political asylum
   
3. noun an assured victory (especially in an election)
   waltz.
   
4. noun a small room large enough to admit entrance
   
5. adjective satellite (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

WordNet