ack-ack

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ack-ack

Where it comes from

From ack (“A”) + ack (“A”), RAF WWI signalese for AA (“anti-aircraft”). (In modern signalese it would be called alpha-alpha.)

noun ack-acks

countable, slang, uncountable Antiaircraft artillery. The army fired upon us with ack-ack.
slang, uncountable Antiaircraft fire. The bomber flew through heavy ack-ack.

Similar: AAA, AA

Thesaurus

noun

Similar: AAA, AA

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MLA

"ack-ack." Wiktionary, via Micwyn, micwyn.com/word/ack-ack. Accessed 6 Nov. 2026.

APA

ack-ack. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/ack-ack

Chicago

"ack-ack." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/ack-ack.

BibTeX

@misc{ack_ack_2026,
  title = {ack-ack},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/ack-ack},
  urldate = {2026-11-06}
}