a serious accident in which the central part of a nuclear reactor melts, causing harmful radiation to escape 核反应堆堆芯熔化（导致核辐射泄漏） - (
economics 经济学 a situation where something fails or becomes weaker in a sudden or dramatic way 崩溃；垮台 - in meltdown
The country is in economic meltdown. 该国的经济崩溃。 🔊🔊 a meltdown on the New York Stock Exchange 纽约股票市场的崩盘
- in meltdown