(genetics) Any technique or mechanism by which the expression of a gene is prevented.

Peace and quiet have great value. / Often the best choice is to say nothing.

(automotive) A device that reduces the noise in an intake system.

(Zoroastrianism) A low, cylindrical, open-topped tower where Zoroastrians place the bodies of deceased people to disintegrate from exposure and consumption by carrion birds such as vultures, the remaining bones being kept in an ossuary; a dakhma.

To breach a norm against communication or against communicating a specific type of information.

An agreement, either formal or tacit, between two or more parties not to discuss some matter nor to reveal any information concerning it, especially in order to avoid blame, embarrassment, or other discomfort.

Synonym of wall of silence

(idiomatic) Strict secretiveness maintained by the members of a group with respect to information which might be contrary to their interests, especially information concerning questionable actions by members of the group.

plural of wall of silence

To start talking in a conversation after a period where nobody speaks. / To state an opinion on a subject that has been taboo for a period of time.