abysm Meaning, Definition & Usage

  1. noun a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively)
    abyss.

WordNet

A*bysm" noun
Etymology
OF. abisme; F. abime, LL. abyssimus, a superl. of L. abyssus; Gr. . See Abyss.
Definitions
  1. An abyss; a gulf. "The abysm of hell." Shak.

Webster 1913