() () [, ; ]a time when a period of economic success ends suddenly经济崩溃◆Hundreds of companies went under (= failed) in the dot-com bust.数百家公司在网络概念股的崩溃中破产了。➡boom () [] () a person or thing that fails破产者；失败的事◆The plan turned out to be a bust.计划失败了。➡ idiom at boom noun