Lewis & Short

† ăbyssus, i, f., = ἄβυσσος (sc. λίμνη).

      1. 1. A bottomless pit, an abyss, Isid. Orig. 13, 20.
      2. 2. The sea, Vulg. Gen. 1, 2.
      3. 3. The place of the dead, Orcus, Hades, Vulg. Rom. 10, 7.
      4. 4. Tartarus, hell, where the wicked are confined, Vulg. Luc. 8, 31; ib. Apoc. 9, 1. So in eccl. Lat.