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- DictionaryHomeland security
noun
- 1. national security, especially with regard to the threat of terrorism within a country's borders: "Department of Homeland Security"
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noun
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Homeland security is an American national security term for "the national effort to ensure a homeland that is safe, secure, and resilient against terrorism and other hazards where American interests, aspirations, and ways of life can thrive" to the "national effort to prevent terrorist attacks within the United States, reduce the vulnerability of the U.S. to terrorism, and minimize the damage from... Wikipedia