red box

English
sense 2

Noun

red box (plural red boxes)

  1. A phreaking device that generates tones to simulate the insertion of coins into a payphone, thus enabling the user to make illegitimate free calls.
  2. (UK politics) A secure briefcase-like box used by ministers in the British government to carry their documents.
    Coordinate term: dispatch box
    • 2013 September 9, Ben Quinn, “No 10 denies David Cameron red box security breach”, in The Guardian‎:
      Downing Street has rejected suggestions that David Cameron might have caused a security breach by briefly leaving his official ministerial red box unaccompanied on the table of a train carriage.
  3. (US, military) A safe located at a nuclear installation containing launch codes.
  4. (informal, US, meteorology) A "tornado watch" notification, indicating that conditions might lead to a tornado though none has yet been sighted.
    See also: severe thunderstorm watch

Coordinate terms

(colored boxes, especially electronic ones):

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