English version

national security

From Longman Dictionary of Contemporary Englishnational securityˌnational seˈcurity noun [uncountable]  the idea that a country must keep its secrets safe and its army strong in order to protect its citizens The number of people who join the army is so low that it is beginning to threaten national security.
Examples from the Corpus
national securityJimmy Carter was often distracted from national security matters by concern over what the maverick Billy might say next.Lord Denning restricted the full application of the rules of natural justice on the ground of national security.Importance of national security considerations Public opinion polls published on the eve of the election showed the two main parties evenly matched.The investigation was done for reasons of national security.Plainly national security can not have been at stake since that had already been damaged.Such information had no relation to national security.
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