Security Classification Definition - MilitaryDictionary.org
1.) A category to which national security information and material is assigned to denote the degree of damage that unauthorized disclosure would cause to national defense or foreign relations of the United States and to denote the degree of protection required. There are three such categories: top secet, secret, and confidential.
In the United States, military vocabulary is standardized by the Department of Defence. These terms are used by the United States Army, Navy, Air Force, and Marine Corps.
Department of Defence, Dictionary of Military and Associated Terms
This term is marked as active and was last updated in 2015
Random Military Term