blockbuster \ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷\noun Etymology:block (I)(space in a city) + buster, from bust, v. + -er 1.: a huge high-explosive demolition bomb usually several tons in weight designed to be dropped from an airplane 2.: something or someone notably outstanding, effective, or violent < they predict the new show will be a blockbuster > < his speech was a real blockbuster >