ack-ack


ack-ack

noun Informal. (esp. during World War II)

  1. antiaircraft fire.
  2. antiaircraft arms.

noun military

    1. anti-aircraft fire
    2. (as modifier)ack-ack guns
  1. anti-aircraft arms

1939, representing A.A., the military abbreviation for anti-aircraft (see ack).

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