Definition:
AAA is the abbreviation for anti-aircraft artillery. This term embraces all guns used for air defense including machines guns of various types to heavy anti-aircraft guns.
By Kennedy Hickman, About.com Guide
US Army forces man an anti-aircraft gun during World War II
Photograph Courtesy of the Library of CongressAAA is the abbreviation for anti-aircraft artillery. This term embraces all guns used for air defense including machines guns of various types to heavy anti-aircraft guns.