Lewis & Short

discursĭo, ōnis, f. [discurro],

  1. I. a running different ways, scattering (late Lat.): discursiones predatoriae, scattered raids for plunder, foragings, Amm. 15, 4, 11.
  2. II. A hasty passing through: discursione rapidā maturabant, Amm. 31, 9, 2.