ack-ack
noun/ˌæk ˈæk/
/ˌæk ˈæk/
[uncountable] (informal)- the repeated firing of guns at aircraftWord Originsignallers' name for the letters AA; ack for A was replaced in military use by able in 1942.
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
Check pronunciation:
ack-ack