Word not found in any official scrabble dictionaries.
"Ack-ack" Definition
noun
Slang an antiaircraft gun.
Source: American Heritage Dictionary
Slang antiaircraft fire.
Source: American Heritage Dictionary
Antiaircraft artillery.
Source: Wiktionary
Antiaircraft fire.
Source: Wiktionary
Artillery designed to shoot upward at airplanes; antiaircraft artillery.
adjective
Of or relating to antiaircraft warfare.
Source: Wiktionary
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