A "lid" is a term used by White House press secretaries to indicate that there will be no news coming out of the White House that day. It is also called a "full lid" and can be called at any time of the day. A "lid" is an important signal for journalists, photographers, and other members of the press corps who need to know whether they will need to cover any more events that day. Once a lid is called, reporters know that they will not miss any significant happenings by leaving the White House premises or turning their attention to other stories.

However, calling a lid does not necessarily mean that the Presidents workday is over or that no more newsworthy events will happen that day. The President may still have private meetings, phone calls, or other activities that are not open to the press. Additionally, a lid is not an absolute guarantee: in rare circumstances, the lid may be "lifted" if there is a significant event or development.

The term "lid" has been used in recent news articles to describe the announcement made by the White House press secretary that there will be no more news coming out of the White House that day.