[{"Bold_text": "noun", "List Items": ["the U.S. department consisting of practically all military aviation forces, established July 26, 1947.", "air force,a similar department in any military organization.", "air force,(formerly) the largest unit in the U.S. Army Air Forces.", "air force,a unit of U.S. Air Force command between an air division and an air command.", "Sometimesair force.the military unit of a nation charged with carrying out military operations in the air.", "British.Royal Air Force."]}]