any piece of information that is held secret
"By the way and this is all I will say," he declared, as if he was about to reveal a state secret, or at least an MSNBC secret.
The notion of a possible hurricane in South Florida in late August was not exactly a state secret.
But today, almost a month after the Shanxi accident, the names of the victims are still a “state secret.”
The U.S. government long considered its collection of Americans' call records to be a state secret.
No one else knew anything about Veronica; that was kept a state secret.
This mistake of the wise Solons was guarded as a state secret.
Yes; and confidentially speaking—this is a state secret, my dear colonel—these will soon be made.
I am also giving away what amounts perhaps to a state secret.
This is a state secret, and he must promise to keep it before you tell.
When a state secret falls into my ears, it is not so easy to get it out of my mouth.