[{"word":"ack-ack","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"Antiaircraft artillery.","synonyms":[],"antonyms":[],"example":"Ack-acks were set up in the square."},{"definition":"Antiaircraft fire","synonyms":[],"antonyms":[],"example":"The bomber flew through heavy ack-ack."}],"synonyms":["AA","AAA"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/ack-ack"]}]