cone of silence

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English[edit]

Etymology[edit]

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Noun[edit]

cone of silence (plural cones of silence)

  1. (radio) A hypothetical device or instrument which prevents eavesdropping on a private conversation.
  2. (communication) An order or directive which prohibits verbal communication about a particular subject.

Usage notes[edit]