To think or think about carefully and at length
She didn't have much time alone to mull their conversation or her troubled thoughts.
I have to mull it around in my head a bit more if you don't mind.
Later in the year he made an expedition to Mull, when he obtained other MSS.
As he drove back to town, he continued to mull over what Under Sheriff Larkin had said about Fitzgerald.
There I'd try to get some time alone with my wife and mull through this train ride to oblivion.