Русско-англо-русский юридический словарь

A "gag order" is the term for when a judge prohibits the attorneys, parties, or witnesses in a pending lawsuit or criminal prosecution from talking about the case to the public. (Legal Information Institute)

GAG ORDER is a judicial ruling barring public disclosure or discussion (as by the press) of information related to a case... (Merriam-Webster Dictionary)

A gag order (also known as a gagging order or suppression order) is an order, typically a legal order by a court or government, restricting information or comment from being made public or passed onto any unauthorized third party. The phrase may sometimes be used of a private order by an employer or other institution. (Wikipedia)