"preoccupied" in the verb sense
1. preoccupy
engage or engross the interest or attention of beforehand or occupy urgently or obsessively
"His work preoccupies him"
"The matter preoccupies her completely
2. preoccupy
occupy or take possession of beforehand or before another or appropriate for use in advance
"the army preoccupied the hills"
"preoccupied" in the adjective sense
1. bemused, lost, preoccupied
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"
2. haunted, obsessed, preoccupied, taken up
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"
Source: WordNet® (An amazing lexical database of English)
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