Contents

EnglishEdit

EtymologyEdit

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

NounEdit

ack-ack ‎(countable and uncountable, plural ack-acks)

  1. Antiaircraft artillery.
    The army fired upon us with ack-ack.
    Ack-acks were set up in the square.
    • 2015, Kate Atkinson, A God in Ruins, ISBN 9780385618717, page 140:
      He had thought how down there on the ground, on enemy soil, there were probably hundreds of Ivys, nice Fräuleins with buck teeth and fiancés on U-boats, manning the German ack-ack, all united in an effort to kill him.
  2. (uncountable) Antiaircraft fire
    The bomber flew through heavy ack-ack.

AdjectiveEdit

ack-ack ‎(not comparable)

  1. Of or relating to antiaircraft warfare.

SynonymsEdit

  • (anti-aircraft gun): AAA, AA