plainclothes

/pleɪnˌkloʊðz/
adjective
  1. Wearing ordinary civilian clothes instead of a uniform, especially for police officers or security personnel.
    • The detective worked in plainclothes to blend in with the crowd.
    • The plainclothes officer approached the suspect without drawing attention.
    • A plainclothes security guard was watching the store for shoplifters.
Synonyms
noun
  1. Ordinary civilian clothing, as opposed to a uniform or official attire.
    • She prefers to travel in plainclothes so no one recognizes her as a pilot.
    • The police officer changed into plainclothes after his shift ended.
    • The security team wore plainclothes to avoid being noticed.
Antonyms