ack-ack
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
Antiaircraft artillery.
Register: slang
Where it’s used:
Used
American English
Examples
The army fired upon us with ack-ack.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Sense 2
Meaning · English
Antiaircraft fire.
Register: slang
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “ack-ack” mean?
Antiaircraft artillery.
Is “ack-ack” formal or informal?
ack-ack is generally slang.