cone of silence

English

Etymology

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

Noun

cone of silence (plural cones of silence)

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

Usage notes

Not to be confused with the similar-sounding code of silence.

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