Definition of official secret in English:
A piece of confidential information that is important for national security: it is a crime to disclose an official secret
More example sentences
- I should like to emphasise with all the power at my command that this case is not primarily about national security or official secrets.
- It is interesting that the attorney general's advice should still be an official secret despite the freedom of information act.
- Apart from extending the protection of official secrets to include any government document, the Bill makes it easier to jail journalists or anyone else found with a leaked government document.