Chasm /(kăz'm)/

Chasm

n.
  1. A deep opening made by disruption, as a breach in the earth or a rock; a yawning abyss; a cleft; a fissure.
    That deep, romantic chasm which slanted down the green hill.
  2. A void space; a gap or break, as in ranks of men.
    Memory . . . fills up the chasms of thought.