Pronunciation: (blok'bus"tur),[key] —n. 1. an aerial bomb containing high explosives and weighing from four to eight tons, used as a large-scale demolition bomb.
2. a motion picture, novel, etc., esp. one lavishly produced, that has or is expected to have wide popular appeal or financial success.
3. something or someone that is forcefully or overwhelmingly impressive, effective, or influential: The campaign was a blockbuster. 4. a real-estate speculator who practices blockbusting.