n.
Variant: also flack
Pronunciation: ' flak
Function: noun
Inflected Form: plural flak also flack
Etymology: German, from Fl ieger a bwehr k anonen, from Flieger flyer + Abwehr defense + Kanonen cannons
Date: 1938
1 : antiaircraft guns
2 : the bursting shells fired from flak
3 also flack : CRITICISM , OPPOSITION