preoccupation
//ˌpriːɒkjʊˈpeɪʃən//
Noun
preoccupationSingular
preoccupationsPlural
1
The state of being absorbed in thought or engrossed with something to the exclusion of other things.
His preoccupation with work made him forget about dinner.
2
A subject or matter that engrosses someone's attention or concern.
Environmental protection has become a major preoccupation for many young people.