Definition of flak in English:

flak

Line breaks: flak
Pronunciation: /flak
 
/
(also flack)

noun

[mass noun]

Origin

1930s: from German, abbreviation of Fliegerabwehrkanone, literally 'aviator-defence gun'.

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Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space