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  1. national security

    • n.
      the safety of a nation against threats such as terrorism, war, or espionage
    • noun: national security

    • 釋義
    • 相關詞

    名詞

    • 1. the safety of a nation against threats such as terrorism, war, or espionage an imminent threat to national security a major national security issue
    • ph.
      (in the US) a body created by Congress after the Second World War to advise the president (who ...

    Oxford Dictionary

    • ph.
      a body created in the US by Congress after World War II to advise the president (who chairs it) ...

    Oxford American Dictionary

    • ph.
      a secret body established in the US after World War II to gather intelligence, deal with coded ...

    Oxford American Dictionary

    • ph.
      (in the US) a secret body established after the Second World War to gather intelligence, deal ...

    Oxford Dictionary

  2. 知識+