Reboot/ˈriːbuːt/ Definition 1 of 4Pro Tip 1/3Technical Troubleshooting Used when fixing a technical issue by restarting a device or system to solve a problem. If the app crashes, try to reboot your phone. Pro Tip 2/3Immediate Action Implies a quick action to rectify an error or malfunction in technology. The server is down – we need to reboot now. Pro Tip 3/3Routine Maintenance Suggests a regular, possibly scheduled, system restart to maintain performance. We reboot the computers every night.