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Definition of flak
flak
/flæk/
flak
flak Lexical Profile
CEFR
C1
Grade
9
Tier
2
Usage
Top 10k
Syllables
1
flak Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
Strong, persistent criticism, opposition, or verbal abuse directed at someone or something.
Example
"The mayor took a lot of flak from residents after proposing an increase in local property taxes."
2
Anti-aircraft artillery fire, or the bursting shells fired from ground defenses at aircraft.
Example
"Historical accounts from the Second World War describe how reconnaissance pilots navigated through heavy flak over industrial cities."
Synonyms
View all synonyms for flak Antonyms
View all antonyms for flakWord Nuance & Usage
Often confused with its homophone 'flack', which traditionally refers to a publicity agent or press representative, whereas 'flak' refers to anti-aircraft fire or severe criticism.
• Rhymes for flak
Word Origin & Etymology
Borrowed in the late 1930s from the German acronym Flak, short for Fliegerabwehrkanone, meaning 'aircraft-defense cannon'.
Cite this Entry
Wordmom. (2026). Definition of Flak. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/flak