say it: pree-ah-kyuh-PAY-shuhn
preoccupation is a noun meaning "an idea that preoccupies the mind and holds the attention". It carries 3 recorded senses.
an idea that preoccupies the mind and holds the attention
the mental state of being preoccupied by something
the act of taking occupancy before someone else does
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for preoccupation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.