A "defender system" refers to a mechanism or set of measures designed to protect something or someone from harm, danger, or attack. It is a system put in place to guard against potential threats and ensure safety. Full definition
The program is modeled after the public defender system, which provides lawyers to anyone accused of a crime. (politico.com)
With Windows Defender System Guard, we are making a leap forward in platform security with memory integrity by default and bringing a born secure device promise to our user base. (blogs.windows.com)
With Windows Defender System Guard, Microsoft is making a platform in security with memory integrity by default. (gizcentral.com)