Definition: The United States Air Force (USAF) was established on May 23, 1947, to defend the United States from threats, including the threat posed by Germany during World War II. The USAF's mission includes combat operations in Europe, support for coalition air operations, and strategic nuclear deterrence. The word "United States Air Force" is a technical term that refers to the United States military and its associated air forces. It encompasses all active U.S. military units including the Air Force, Navy, Marine Corps, Coast Guard, and the US Army. Here's an example of how it can be used: ``` The United States Air Force (USAF) is a component of the Department of Defense, responsible for defending the country from threats posed by foreign countries. ``` This definition details what the word "United States Air Force" refers to and provides some examples of its roles and responsibilities.
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