United States Air Force

United States Air Force

noun
the permanent or regular military air force of the United States, established in 1947 as a separate service under the authority of the Department of Defense: a branch of the U.S. Army before 1947. Abbreviation: USAF
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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WordNet
united states air force

noun
the airforce of the United States of America; the agency that defends the United States through control and exploitation of air and space 
WordNet® 3.0, © 2006 by Princeton University.
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