power-down (also power·down) BrE /ˈpaʊə daʊn/ 🔊NAmE /ˈpaʊər daʊn/ 🔊 noun [countable, uncountable] a time when a machine or system stops working （机器或系统的）停止运行◆a power-down of the whole building整座大楼的瘫痪◆The internal clock and date were not stored after power-down. 内置时钟和日期在停机之后没有保存下来。🔊🔊