getting rid of something problematic
Stop means something different in a story where the Main Character has a Resolve of Change than in a story where the Main Character has a Resolve of Steadfast. If the Main Character Changes because he possesses a detrimental trait, then he Stops doing or being something he has been. If the Main Character is Steadfast in holding out for something outside himself to be brought to a halt, he is hoping that it will Stop. The term simply describes an aspect of the growth which happens in the Main Character.