Ack-ack

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  ack-ack \ack-ack\ n. [from AA, meaning antiaircraft pronounced
     ack-ack by British signalmen.] (Mil.)
     Artillery designed to shoot upward at airplanes; antiaircraft
     artillery.
  
     Syn: antiaircraft, antiaircraft gun, flak, pompom, pom-pom,


          ack-ack gun
          [WordNet 1.5 +PJC]

From WordNet (r) 2.0 [wn]:

  ack-ack
       n : artillery designed to shoot upward at airplanes [syn: {antiaircraft},
            {antiaircraft gun}, {flak}, {flack}, {pom-pom}, {ack-ack
           gun}]