Definitions
1.nounHell; the bottomless pit; primeval chaos; a confined subterranean ocean.
2.noun(frequently figurative) A bottomless or unfathomed depth, gulf, or chasm; hence, any deep, immeasurable; any void space.
3.nounAnything infinite, immeasurable, or profound.
4.nounMoral depravity; vast intellectual or moral depth.
5.nounAn impending catastrophic happening.
6.nounThe center of an escutcheon.
7.nounThe abyssal zone.
8.nounA difference, especially a large difference, between groups.