noun Informal. (esp. during World War II)
- antiaircraft fire.
- antiaircraft arms.
noun military
-
- anti-aircraft fire
- (as modifier)ack-ack guns
- anti-aircraft arms
1939, representing A.A., the military abbreviation for anti-aircraft (see ack).
noun Informal. (esp. during World War II)
noun military
1939, representing A.A., the military abbreviation for anti-aircraft (see ack).