Downtime/ˈdaʊntaɪm/ Definition 1 of 3Pro Tip 1/3Technical Issues Refers to problems causing systems or services to stop working. The IT department is fixing the network's downtime. Pro Tip 2/3Business Impact Indicates a possible negative effect on business operations. The store's register downtime affected sales. Pro Tip 3/3Maintenance Related Often planned for updates or repairs. There will be downtime tonight for server maintenance.