The safety of a nation against threats such as terrorism, war, or espionage.
an imminent threat to national security
as modifiera major national security issue
Example sentencesExamples
In his post-war role, he placed great emphasis on the importance of strategic vision and historical insight in national security policy-making.
He spoke of his conviction that academic freedom is essential to our national security.
The party's members are plainly in disarray and confusion over the serious issue of national security.
Both men were remembered for the imprint they left on their families and fellow Navy Seals, whose names and ranks we withheld for reasons of national security.
The flight restrictions were being imposed in the name of national security.
A federal judge lifted the gag order and rejected the government's argument that identifying the plaintiff would pose a threat to national security.
National archives staff checked the documents for information sensitive to national security and law enforcement matters.
Our right to travel was overcome by national security imperatives.
They were hired to do work that could compromise our national security.
The danger to national security comes from the fact that they're using analogue radio communications for such sensitive details.