Lewis & Short

sŭperfūsĭo, ōnis, f. [superfundo],

  1. I. a pouring or spreading over or upon (late Lat.): aquarum caelestium, Amm. 17, 7, 12: pavimenti, Pall. 1, 17, 1.
  2. II. An overflowing: haec, Ambros. Hexaëm. 3, 3, 14: aquarum, id. ib. 3, 2, 7.