English Explanatory Dictionary

ack-ack

English dictionary entry

Meanings

noun
  1. Antiaircraft artillery.
  2. Antiaircraft fire.

Word forms

ack-ack ack-acks

Etymology

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

Synonyms

AAA AA
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