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air force

 - 3 dictionary results

Air Force

–noun
1. the U.S. department consisting of practically all military aviation forces, established July 26, 1947.
2. (lowercase) a similar department in any military organization.
3. (lowercase) (formerly) the largest unit in the U.S. Army Air Forces.
4. (lowercase) a unit of U.S. Air Force command between an air division and an air command.
5. (sometimes lowercase) the military unit of a nation charged with carrying out military operations in the air.
6. British. Royal Air Force.

Origin:
1915–1920
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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air force  
n.  
  1. The aviation branch of a country's armed forces, such as the U.S. Air Force.

  2. A unit of the U.S. Air Force larger than a division and smaller than a command.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

air force 
1917, from air + force, first attested with creation of the Royal Air Force. There was no United States Air Force until after World War II. The Air Corps was an arm of the U.S. Army. In 1942, the War Department reorganized it and renamed it Army Air Forces. The National Security Act of 1947 created the Department of the Air Force, headed by a Secretary of the Air Force, and the U.S.A.F.
Online Etymology Dictionary, © 2001 Douglas Harper
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