preoccupied

(verb) engage or engross the interest or attention of beforehand or occupy urgently or obsessively. Synonyms: preoccupy. Examples: "His work preoccupies him." "The matter preoccupies her completely--she cannot think of anything else."

(verb) occupy or take possession of beforehand or before another or appropriate for use in advance. Synonyms: preoccupy. Example: "The army preoccupied the hills."

(adj) deeply absorbed in thought. Synonyms: bemused, deep in thought(predicate), lost(predicate). Examples: "As distant and bemused as a professor listening to the prattling of his freshman class." "Lost in thought." "A preoccupied frown."

(adj) having or showing excessive or compulsive concern with something. Synonyms: haunted, obsessed, taken up(predicate). Examples: "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."