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ack-ack

noun
\ ˈak-ˌak How to pronounce ack-ack (audio) \

Definition of ack-ack

: an antiaircraft gun also : antiaircraft fire

First Known Use of ack-ack

1917, in the meaning defined above

History and Etymology for ack-ack

British signalmen's telephone pronunciation of AA, abbreviation of antiaircraft entry 1

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