pre·oc·cu·pan·cy 
(prē-ŏkyə-pən-sē)
(prē-ŏkyə-pən-sē)n.
1. The act or right of occupying a place beforehand or in advance.
2. The state of being preoccupied or engrossed; preoccupation.
- upper atmosphere
- Upper Avon
- Upper Avon
- upper bound
- Upper California
- Upper California
- Upper Canada
- Upper Carboniferous
- uppercase
- upper class
- upper-class
- upperclassman
- upper crust
- upper-crust
- uppercut
- Upper Egypt
- upper GI series
- upper hand
- Upper Klamath Lake
- uppermost
- Upper Palatinate
- Upper Peninsula
- Upper Silesia
- Upper Sorbian
- Upper Tunguska