ack ack

ack-ack

[ak-ak]
noun Informal. (esp. during World War II)
1.
antiaircraft fire.
2.
antiaircraft arms.
Also, Ack-Ack.


Origin:
1935–40; for A.A. (abbreviation of a(nti) a(ircraft)) as said by British signalmen referring to sense 2

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World English Dictionary
ack-ack (ˈækˌæk)
 
n
1.  a.  anti-aircraft fire
 b.  (as modifier): ack-ack guns
2.  anti-aircraft arms
 
[C20: British army World War I phonetic alphabet for AA, abbreviation of anti-aircraft]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

ack-ack
1939, representing A.A., the military abbreviation for anti-aircraft (see ack).
Online Etymology Dictionary, © 2010 Douglas Harper
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