UBS Dictionary of the Greek New Testament

Sense 1: abyss, abode of evil spirits, very deep place

Semantic entry: 1.20

Semantic domains: Geographical Objects and Features

Subdomains: Regions Below the Surface of the Earth

Definition: (a figurative extension of meaning of ἄβυσσος ‘pit,’ not occurring in the NT) a location of the dead and a place where the Devil is kept (RV REV 20:3 · LV REV 20:3 · Read together REV 20:3), the abode of the beast as the antichrist (RV REV 11:7 · LV REV 11:7 · Read together REV 11:7), and of Abaddon, as the angel of the underworld (RV REV 9:11 · LV REV 9:11 · Read together REV 9:11)

Notes: ἄβυσσος is sometimes rendered as ‘a very deep hole’; in other instances, ‘a hole without a bottom’ or ‘the deepest hole in the earth.’