underworld
Definitions
The mythical place where the souls of the dead are believed to reside.
The world of organized crime and illegal activities.
A social stratum existing outside the bounds of conventional or legal society.
Examples
The detective spent years investigating the dark secrets of the city's criminal underworld.
In Greek mythology, Orpheus traveled to the underworld to rescue his beloved Eurydice.
The novel depicts a gritty underworld where rival gangs fight for control of the streets.