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. Abbr.: USAF
UNITED STATES AIR FORCE
Meaning of UNITED STATES AIR FORCE in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012