(DoD, NATO) Official information or matter in any form or of any nature which requires protection in the interests of national security. See also unclassified matter.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
| APA | Military Dictionary (DoD). (2011). classified matter. Retrieved September 23, 2026, from http://smartdefine.org/classified_matter/definitions/1960791 |
| Chicago | Military Dictionary (DoD). 2011. "classified matter" http://smartdefine.org/classified_matter/definitions/1960791 (accessed September 23, 2026). |
| Harvard | Military Dictionary (DoD) 2011, classified matter, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/classified_matter/definitions/1960791>. |
| MLA | Military Dictionary (DoD). "classified matter" 4 April 2011. Web. 23 September 2026. <http://smartdefine.org/classified_matter/definitions/1960791> |