A "predefined set" refers to a group of things or a list that has already been decided or established in advance. It means that the set of items or options are already determined and cannot be changed. Full definition
X-ray systems can identify of all kinds of unwanted materials through predefined settings. (packagingeurope.com)
Open up torque on your android device On the main screen hit the settings button (gear shaped button)- settings - manage extra PID's / Sensors - hit the menu button (mine is the three dots on the top right)- add predefined set - chrysler / dodge / jeep / mercedes (mechanics.stackexchange.com)
Not to be confused with committing to a particular delivery date or predefined set of functionality, commitment describes the trust the team places in the agile approach and its values. (entrepreneur.com)