the criminal element of human society.
the imagined abode of departed souls or spirits; Hades.
a region below the surface, as of the earth or a body of water.
the opposite side of the earth; the antipodes.
a. criminals and their associates considered collectively
the regions below the earth's surface regarded as the abode of the dead; Hades
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Even as the hacking underworld has splintered, new threats are emerging.
It is an engine of growth in the underworld of the city's informal economy, a vast sector with an astonishing volume of supply.
Furthermore, he thought he knew where to look for them: in the weird underworld of quantum mechanics.
Researchers have discovered an underworld of genetic exchange among bacteria, one more vast than previously imagined.
And each tomb was designed to reflect the underworld in which this rebirth occurred.
Mammoth does not glamorize the underworld with garish lighting.
Get a macabre look inside the underworld in this gallery of tombs, coffins, and catacombs.
His boyish enthusiasm was infectious, and he delighted in telling non-divers about the wilder aspects of his watery underworld.
In this case, the underworld is a literal underworld of demons and supernatural beings.