British signalmen's telephone pronunciation of AA, abbreviation of antiaircraft entry 1
1917, in the meaning defined above
ack
ack-ack
ackee
“Ack-ack.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ack-ack. Accessed 21 Nov. 2024.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
See Definitions and Examples »
Get Word of the Day daily email!
Share