- antiaircraft fire.
- antiaircraft arms.
Origin of ack-ack
1935–40; for A.A. (abbreviation of a(nti) a(ircraft)) as said by British signalmen referring to sense 2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ack-ack
That was a score for the Ack-Ack gunners and the ground boys.
"The ack-ack will knock those planes out of the sky," one of the sailors said.The Lost Warship
Robert Moore Williams
The Jerries were at it again and seemed to have slipped inside the balloons and the ring of Ack-Ack guns.
- anti-aircraft fire
- (as modifier)ack-ack guns
- anti-aircraft arms
C20: British army World War I phonetic alphabet for AA, abbreviation of anti-aircraft
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for ack-ack
1939, representing A.A., the military abbreviation for anti-aircraft (see ack).
Online Etymology Dictionary, © 2010 Douglas Harper