preoccupied

Adjective

• having or showing excessive or compulsive concern with something
  • became more and more haunted by the stupid riddle
    
  • was absolutely obsessed with the girl
    
  • got no help from his wife who was preoccupied with the children
    
  • he was taken up in worry for the old woman
    

• deeply absorbed in thought
  • as distant and bemused as a professor listening to the prattling of his freshman class
    
  • lost in thought
    
  • a preoccupied frown
    

Related words

• Synonyms: 
  haunted , obsessed , taken up(p) , bemused , deep in thought(p) , lost(p)