Defense Department, Department of Defense, DoD, United States Department of Defense, Defense - the federal department responsible for safeguarding national security of the UnitedStates; created in 1947

armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"

military intelligence - an agency of the armed forces that obtains and analyzes and uses information of strategic or tactical military value

United States intelligence agency - an intelligence service in the United States

IC, Intelligence Community, National Intelligence Community, United States Intelligence Community - a group of government agencies and organizations that carry out intelligence activities for the United States Government; headed by the Director of Central Intelligence