pre·oc·cu·pan·cy /(ˌ)priˈɑkjəpən(t)si/
Pre·oc·cu·pan·cy n. The act or right of taking possession before another; as, the preoccupancy of wild land.
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preoccupancy
n 1: the mental state of being preoccupied by something [syn: preoccupation,
absorption, engrossment]
2: the act of taking occupancy before someone else does [syn: preoccupation]