Microsoft Defender
Noun · Security & Infosec
Definitions
Microsoft's family of security products and capabilities for endpoints, identity, cloud apps, and related environments, often including antivirus, EDR, and threat protection features. In day-to-day use, 'Microsoft Defender' commonly refers to the built-in Windows endpoint protection stack and its enterprise management extensions.
In plain English: Microsoft's security platform and endpoint protection tooling.
Example: "Microsoft Defender raised the alert when the unsigned process attempted credential dumping from LSASS."