Usually means: Anti-aircraft artillery gunfire or noise.
Definitions Related words Phrases Mentions
We found 20 dictionaries that define the word ack-ack:

General (18 matching dictionaries)
  1. ack-ack: Merriam-Webster
  2. ack-ack: Oxford Learner's Dictionaries
  3. ack-ack: American Heritage Dictionary of the English Language
  4. ack-ack, ack-ack: Collins English Dictionary
  5. ack-ack: Vocabulary.com
  6. ack-ack: Wordnik
  7. ack-ack: Wiktionary
  8. ack-ack: Webster's New World College Dictionary, 4th Ed.
  9. ack-ack: Infoplease Dictionary
  10. ack-ack: Dictionary.com
  11. ack-ack: Online Etymology Dictionary
  12. Ack-ack: Wikipedia, the Free Encyclopedia
  13. ack-ack: Rhymezone
  14. Ack-Ack, ack-ack: Stammtisch Beau Fleuve Acronyms
  15. ack-ack: FreeDictionary.org
  16. ack-ack: Mnemonic Dictionary
  17. ack-ack: TheFreeDictionary.com
  18. ack-ack: Merriam-Webster

Computing (1 matching dictionary)
  1. ack-ack: Encyclopedia

Slang (1 matching dictionary)
  1. ack-ack: Urban Dictionary

(Note: See ack-acks as well.)

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Definitions from Wiktionary (ack-ack)

▸ noun:  (military slang) Antiaircraft artillery.
▸ noun:  (military slang, uncountable) Antiaircraft fire.

Similar:
pom-pom, antiaircraft, flak, ack-ack gun, antiaircraft gun, A.A., anti-aircraft, triple A, Archie, AAAOC, more...

Opposite:
no word found

Types:
antiaircraft, flak, more...

Phrases:
ack-ack gun, more...
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Similar:
pom-pom, antiaircraft, flak, ack-ack gun, antiaircraft gun, A.A., anti-aircraft, triple A, Archie, AAAOC, more...

Opposite:
no word found

Types:
antiaircraft, flak, more...

Phrases:
ack-ack gun, more...



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