Definitionen
1.AdjectiveBelonging to, or resembling, an abyss; unfathomable. .mw-parser-output .defdate{font-size:smaller}
2.AdjectiveOf or belonging to the ocean depths, especially below 2000 metres (6500 ft): abyssal zone.
3.AdjectivePertaining to or occurring at excessive depths in the earth's crust; plutonic.
4.AdjectiveIn the utter depths of despair; gloomy.