PREOCCUPATION

[noun]My main preoccupation (= The thing that I am thinking about most) now is trying to keep life normal for the sake of my two boys. [C]The opening chapter of the book introduces the school staff and their problems and preoccupations, both emotional and academic. [C]Lately, his preoccupation with (= thinking only about) football had caused his marks at school to slip. [U]Such preoccupation with (= thinking only about) your work isn't healthy. [U]