Source : Webster's Revised Unabridged Dictionary (1913)

Chasm \Chasm\, n. [L. chasma, Gr. ?, fr. ? to grape, 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.

            That deep, romantic chasm which slanted down the
            green hill.                           --Coleridge.

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

            Memory . . . fills up the chasms of thought.
                                                  --Addison.

Source : WordNet®

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

Source : Free On-Line Dictionary of Computing

CHASM
     
        CHeap ASseMbler.
     
        A {shareware} {assembler} for {MS-DOS}.
     
        (1994-11-15)