preoccupied (adj)I have always found vocabulary to be a great entryway into thought. If we are going to change the world next year and "Occupy 2012," we will need to escape the gravitational field of our own individualistic preoccupations.
1. engrossed or absorbed in something, esp one's own thoughts
2. already or previously occupied
3. (Life Sciences & Allied Applications / Biology) Biology (of a taxonomic name) already used to designate a genus, species, etc.