Lewis & Short

praeoccŭpātĭo, ōnis, f. [praeoccupo].

  1. I. A seizing beforehand, preoccupation: locorum praeoccupatio, Nep. Eum. 3, 6.
  2. II. Rhet. fig., an anticipation of what properly comes afterwards, prolepsis, Beda, Schem. et Tropis init.
  3. III. A disease that violently distends the abdomen: quae passio Graece emphragma, Latine praeoccupatio dicitur, Veg. Vet. 1, 40.