The Collaborative International Dictionary
Abime \A*bime"\ or Abyme \A*byme"\, n. [F. ab[^i]me. See Abysm.] A abyss. [Obs.]
n. (obsolete form of abysm English)
An abîme is the geographical term for a vertical shaft in karst terrain that may be very deep and usually opens into a network of subterranean passages.