"Complete sovereignty" refers to having absolute power or control over a certain territory or group of people. It means having the highest authority and the ability to make decisions without interference from outside forces. Full definition
What we have today is not nation - states becoming a European state, because states will not willingly surrender complete sovereignty. (blog.politics.ox.ac.uk)
When the early church fathers spoke of God's apatheia (often translated «impassability»), what they had in mind was God's constancy, reliability, and complete sovereignty over everything that exists outside of himself. (firstthings.com)
Persons who have held this view have done so on the basis of God's complete sovereignty in salvation. (religion-online.org)