The Collaborative International Dictionary of English v.0.48:

blitzkrieg \blitz"krieg\ (bl[i^]tz"kr[=e]g), n. [German, blitz
   lightning + krieg war.]
   an overwhelming all-out attack with infantry, armor, and air
   forces, especially by surprise against an unprepared enemy.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

blitzkrieg \blitz"krieg\ v.
   to fight a quick and surprising war.

   Syn: fight a blitzkrieg.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

blitzkrieg
    n 1: a swift and violent military offensive with intensive
         aerial bombardment [syn: blitz, blitzkrieg]
    v 1: fight a quick and surprising war