Adjacent Words

ack-ack definitions

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WordNet (r) 3.0 (2005)

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

Merriam Webster's

noun Etymology: British signalmen's former telephone pronunciation of AA, abbreviation of antiaircraft Date: 1926 an antiaircraft gun; also antiaircraft fire

Oxford Reference Dictionary

adj. & n. colloq. --adj. anti-aircraft. --n. an anti-aircraft gun etc. Etymology: formerly signallers' name for the letters AA