noun Informal. (esp. during World War II)
Origin of ack-ack
Examples from the Web for ack-ack
"The ack-ack will knock those planes out of the sky," one of the sailors said.The Lost Warship|Robert Moore Williams
That was a score for the Ack-Ack gunners and the ground boys.
The Jerries were at it again and seemed to have slipped inside the balloons and the ring of Ack-Ack guns.
British Dictionary definitions for ack-ack
- anti-aircraft fire
- (as modifier)ack-ack guns
Word Origin for ack-ack
Word Origin and History for ack-ack
1939, representing A.A., the military abbreviation for anti-aircraft (see ack).