Ack-ack meaning

ăkăk
An antiaircraft gun.
noun
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Antiaircraft fire.
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An antiaircraft gun or its fire.
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The army fired upon us with ack-ack.

Ack-acks were set up in the square.

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(uncountable) Antiaircraft fire.

The bomber flew through heavy ack-ack.

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Of or relating to antiaircraft warfare.
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Origin of ack-ack

  • British telephone code for AA abbreviation for antiaircraft

    From American Heritage Dictionary of the English Language, 5th Edition

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

    From Wiktionary