ack-ack

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈækˌæk/US:USA pronunciation: respellingUSA pronunciation: respelling(ak′ak′)


WordReference Random House Unabridged Dictionary of American English © 2025
ack-ack  (ak′ak′),USA pronunciation n. [Informal.](esp. during World War II).
  1. Militaryantiaircraft fire.
  2. Militaryantiaircraft arms.
Also, Ack′-Ack′. 
  • for A.A. (abbrev. of a(nti) a(ircraft)) as said by British signalmen referring to sense 2 1935–40

Collins Concise English Dictionary © HarperCollins Publishers::
ack-ack / ˈækˌæk/
  1. anti-aircraft fire
  2. (as modifier): ack-ack guns
Etymology: 20th Century: British army World War I phonetic alphabet for AA, abbreviation of anti-aircraft
'ack-ack' also found in these entries (note: many are not synonyms or translations):
ack.

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