1. absorbed in thought; distracted by something on one’s mind
2. busy with or engaged in something

Examples

• She seemed preoccupied during the meeting and barely spoke.
• He was too preoccupied with his phone to notice the beautiful sunset.
• The teacher could tell the student was preoccupied with something at home.
• I’m sorry I didn’t hear you – I was preoccupied with work.
• She appeared preoccupied and kept checking her watch.
• The manager was preoccupied with the upcoming deadline.
• He walked past without saying hello, clearly preoccupied with his thoughts.