National Security and Defense

Definition

National security refers to measures taken by a state to ensure its survival through use of diplomatic, military, and power projection means. Defense refers to the military forces and equipment a country uses to protect its borders and people.

Analogy

Think of national security and defense as your home's security system. The locks on your doors (defense) physically prevent intruders from entering, while the alarm system (national security measures) alerts you or authorities if someone tries to break in.

Related terms

Military-Industrial Complex: A concept relating to the strong relationship between a nation's military leadership and the industries that support it.

Homeland Security: A concerted national effort to prevent terrorist attacks within the United States, reduce America’s vulnerability to terrorism, and minimize damage from potential attacks and natural disasters.

Foreign Policy: A government's strategy in dealing with other nations.