preoccupied
adj.thinking or worrying about something so much that you do not pay attention to other things. You might look distracted or busy because your mind is elsewhere.
adj.engrossed in thought or distracted by a particular concern to the exclusion of other matters. Often used predicatively after linking verbs such as 'seem', 'look', or 'appear'.
“She seemed preoccupied and didn't hear my question.”
“The manager was too preoccupied with the upcoming audit to notice the morale issues within the team.”
“While he tried to focus on the lecture, he remained visibly preoccupied by the news he had received earlier that morning, frequently checking his phone for updates.”
Typically takes the preposition 'with' or 'by' to indicate the cause of distraction.
Preoccupied is followed by 'with' or 'by' rather than 'in' when describing the object of focus.
“Of all of the distracted teams, Marseille are the most preoccupied with off-field matters.”
“I was preoccupied by other concerns – the crushing exhaustion that I would describe to my doctors as “not normal tiredness”, the unexplained falls from my bike.”