Main Entry: flak

Variant(s): also flack \ˈflak\

Function: noun

Inflected Form(s): plural flak also flack

Etymology: German, from Fliegerabwehrkanonen, from Flieger flyer + Abwehr defense + Kanonen cannons

Date: 1938

1 : antiaircraft guns
2 : the bursting shells fired from flak
3also flack : criticism, opposition