0 a piece of information that is known only by the government and its employees:
There is no reason why what the inspector has said should be an official secret.
This was nothing in the nature of an official secret.
Is it not a fact that a complete fabrication cannot be an official secret?
What is she—or is that an official secret?
I can reveal what could well be an official secret and get me into trouble.
She was told that it was an official secret.
This letter, which was itself an official secret, was leaked to the press and parts of it appeared in the press.
I do not know what an official secret is.
