Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun ack-ack

1 sense of ack-ack

Sense 1
antiaircraft, antiaircraft gun, flak, flack, pom-pom, ack-ack, ack-ack gun -- (artillery designed to shoot upward at airplanes)
       => gun -- (a weapon that discharges a missile at high velocity (especially from a metal tube or barrel))