Power down Definition 1 of 3Pro Tip 1/3Technical Usage Used specifically in tech contexts, like turning off devices or systems. Before leaving the office, everyone must power down their computers. Pro Tip 2/3Complete Shutdown Implies a full switch-off, not just putting it into standby mode. The technicians will power down the servers for maintenance tonight. Pro Tip 3/3Safety Measure Sometimes used as a precautionary step in case of technical issues. If the software update fails, power down your device immediately.