ack-ack

noun

ˈak-ˌak How to pronounce ack-ack (audio)
: an antiaircraft gun
also : antiaircraft fire

Word History

Etymology

British signalmen's telephone pronunciation of AA, abbreviation of antiaircraft entry 1

First Known Use

1917, in the meaning defined above

Time Traveler
The first known use of ack-ack was in 1917

Dictionary Entries Near ack-ack

ack

ack-ack

ackee

See More Nearby Entries 

Cite this Entry

“Ack-ack.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ack-ack. Accessed 18 Apr. 2024.

Copy Citation

Share

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Popular in Grammar & Usage

See All

Your vs. You're: How to Use Them Correctly

Every Letter Is Silent, Sometimes: A-Z List of Examples

More Commonly Mispronounced Words

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)

Absent Letters That Are Heard Anyway
See All

Popular in Wordplay

See All

10 Words from Taylor Swift Songs (Merriam's Version)

A Great Big List of Bread Words

10 Scrabble Words Without Any Vowels

12 More Bird Names that Sound Like Insults (and Sometimes Are)

9 Superb Owl Words
See All

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game You can make only 12 words. Pick the best ones!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A crossword with a twist
winning words from the national spelling bee logo
Spelling Bee Quiz Can you outdo past winners of the National Spelli...