"preoccupying" 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"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License