n. 25B6; noun
an air of preoccupation : PENSIVENESS, concentration, engrossment, absorption, self-absorption, musing, thinking, deep thought, brown study, brooding; abstraction, absent-mindedness, distraction, forgetfulness, inattentiveness, wool-gathering, daydreaming.
their main preoccupation was feeding their family : OBSESSION, concern; passion, enthusiasm, hobby horse.