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  1. homeland security
  2. noun

    • 1. national security, especially with regard to the threat of terrorism within a country's borders:

      Department of Homeland Security
  3. Variation

    • n.: noun: homeland security

    • the department of the US government responsible for protecting the United States and its territory from terrorism and large-scale disasters, and for responding to such events when they occur. It was established in 2002 in response to the terrorist attacks of September 11, 2001.
    • the department of the US government responsible for protecting the United States and its territory from terrorism and large-scale disasters, and for responding to such events when they occur. It was established in 2002 in response to the terrorist attacks of September 11, 2001.
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