The lower of inferior world; the world which is under the heavens; the earth.

The mythological place of departed souls; Hades.

The portion of the world which is below the horizon; the opposite side of the world; the antipodes.

Underworld is a serial in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from January 7 - January 28, 1978.

The underworld is a fictional location in the Dream Cycle of H.P. Lovecraft. It is described in detail in Lovecraft's novella The Dream-Quest of Unknown Kadath (1926).

The underworld is a fictional location in the Sword of Truth fantasy series by Terry Goodkind.

Underworld is the principal name under which British electronic music duo Karl Hyde and Rick Smith have recorded since the late 1970s. The band is perhaps best known for two tracks, Underneath The Radar in 1988 and Born Slippy .NUXX, a track made popular in the hit 1996 Danny Boyle film Trainspotting.

Underworld is a 2003 horror/action movie (see 2003 in film) about the secret history of vampire and werewolves, where the latter are referred to as "Lycan" as an abbreviated form of lycanthrope. While the film and its sequel opened to mixed reviews they have developed somewhat of a cult following, as films of their kind are seldom so ambitious. The main plot revolves around Selene (Kate Beckinsale), a female vampire "Death Dealer", or one who hunts Lycans, a job she is extremly good at; due to the fact that she is fueled with hatred for the whole species, whom she belives to be responsible for her family's slaughter.

Underworld is the second studio album by the progressive/neo-classical metal band Adagio, released in 2003.

Underworld is a novel written in 1997 by Don De Lillo. It was nominated for the National Book Award, is one of his better-known novels, and was a best-seller.

The inferior part of mankind.

Underworld was one of the ew-too talker popular during the mid 1990s.

a sine wave movement of consciousness evolution)

the criminal class