The Collaborative International Dictionary of English v.0.48:

Chasm \Chasm\ (k[a^]z'm), n. [L. chasma, Gr. cha`sma, fr.
   chai`nein to gape, to open wide. See Chaos.]
   1. A deep opening made by disruption, as a breach in the
      earth or a rock; a yawning abyss; a cleft; a fissure.
      [1913 Webster]

            That deep, romantic chasm which slanted down the
            green hill.                           --Coleridge.
      [1913 Webster]

   2. A void space; a gap or break, as in ranks of men.
      [1913 Webster]

            Memory . . . fills up the chasms of thought.
                                                  --Addison.
      [1913 Webster]

WordNet (r) 3.0 (2006):

chasm
    n 1: a deep opening in the earth's surface

The Free On-line Dictionary of Computing (19 January 2023):

CHeap ASseMbler
CHASM

    (CHASM) A shareware assembler for MS-DOS.

   (1994-11-15)