Source : Webster's Revised Unabridged Dictionary (1913)

Fathomless \Fath"om*less\, a.
   1. Incapable of being fathomed; immeasurable; that can not be
      sounded.

            And buckle in a waist most fathomless. --Shak.

   2. Incomprehensible.

            The fathomless absurdity.             --Milton.