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We found 10 dictionaries with English definitions that include the word national security:
Click on the first link on a line below to go directly to a page where "national security" is defined.

General (8 matching dictionaries)

1. national security: Macmillan Dictionary [home, info]
2. National-Security, National-security, national-security: Wordnik [home, info]
3. national security: Wiktionary [home, info]
4. national security: Dictionary.com [home, info]
5. National Security (film), National Security, National security: Wikipedia, the Free Encyclopedia [home, info]
6. national security: Dictionary/thesaurus [home, info]

Slang (1 matching dictionary)

7. National Security: Urban Dictionary [home, info]

Tech (1 matching dictionary)

8. national security: DOD Dictionary of Military Terms [home, info]

Quick definitions from Wiktionary (national security) ▸ noun:  The safety of a country as managed through the exercise of economic and political power, intelligence agencies and diplomacy. ▸ Words similar to national security ▸ Usage examples for national security ▸ Words that often appear near national security ▸ Rhymes of national security ▸ Invented words related to national security