underworld

underworld — noun

1. a hidden network of people involved in illegal activities such as drug trading,

1.nounB2
Definition

a hidden network of people involved in illegal activities such as drug trading, stealing, and violence, often operating outside the reach of the law and government control

Example

The city's underworld controlled most of the illegal gambling houses in the district.

the + underworld as subject (acting entity)

A local journalist was killed for writing too openly about the criminal underworld.

writing about + the criminal underworld

Common collocations
  • the criminal underworld
  • the city's underworld
  • underworld figure
  • underworld boss
  • underworld connections
  • underworld dealings
  • enter the underworld
  • the Tokyo underworld
Synonyms
  • organized crime

    broader term referring to the system itself rather than the people in it

  • underbelly

    metaphorical, focusing on the hidden, unpleasant side of society; less precise about criminal structure

  • gangland

    more specific to violent street gangs; less formal in tone

Antonyms

Grammar Patterns

the + underworld

the + criminal + underworld

underworld + [noun]

Usage Note

Almost always used with 'the' — 'the underworld.' Unlike 'underground' (which refers to a subculture or hidden scene), 'underworld' specifically denotes organized criminal networks.

Common Mistakes

The punk music underworld was very active.
The punk music underground was very active.
'underworld' refers to organized crime, not a counterculture scene.

2. in ancient stories and religious beliefs, a dark underground world where dead so

2.nounB2
Definition

in ancient stories and religious beliefs, a dark underground world where dead souls are said to dwell

Example

In Greek mythology, the underworld was ruled by the god Hades.

In [mythology], the underworld was… (mythological frame)

Ancient Egyptians believed the underworld was a place where the dead were judged.

believed + the underworld was (clause with belief verb)

Common collocations
  • the Greek underworld
  • the underworld in mythology
  • journey to the underworld
  • descent into the underworld
  • underworld god
  • underworld realm
  • ruler of the underworld
  • gate of the underworld
Synonyms
  • the afterlife

    broader term covering any existence after death, not necessarily a physical place beneath the earth

  • the next world

    more general and neutral; does not specify a location under the earth

  • hell

    specifically a place of punishment; narrower and more judgmental than the neutral 'underworld'

Antonyms
  • the living world

    the realm of the living on the earth's surface

  • the heavens

    the sky realm where gods or blessed souls dwell, opposed to the underground realm of the dead

Grammar Patterns

the + underworld

[mythology name] + underworld

travel to + the underworld

Usage Note

Used with 'the.' In specific mythologies, the term may be capitalized (the Underworld) or replaced by a proper name such as Hades or Hel. Common in comparative religion and literature discussions.

Synonym discussion

Sense: noun/1

"Underworld" (sense 1) refers to the hidden network of people and activities involved in organized crime. "Organized crime" is the most formal and precise term, describing the system of large-scale illegal business operations with a clear hierarchy. "Gangland" is more informal and tied to violent street gangs, often used in news reports about shootings and turf wars. "Underbelly" is more metaphorical, focusing on the unpleasant, corrupt side of a city or society without necessarily implying criminal organization. "The mob" specifically refers to American or Italian organized crime families, especially the Mafia. For example: a news report might say "the city's underworld controls the drug trade" (broad criminal network), or "organized crime has infiltrated the construction industry" (the system itself), or "the underbelly of the tourism industry involves child labor" (hidden corruption, not necessarily organized crime).

organized crimeganglandunderbellythe mob

Common collocations

Nouns

  • underworld figure
  • underworld boss
  • underworld connections
  • underworld dealings
  • underworld god
  • underworld realm

Phrases

  • the criminal underworld
  • ruler of the underworld
  • descent into the underworld

Prepositions

  • in the underworld
  • into the underworld
  • to the underworld
  • from the underworld

Etymology

Old EnglishMiddle EnglishEnglish

"Underworld" is a compound of Old English "under" (beneath) and "weorold" (world, age of man). The word originally meant simply "the lower world" or "the earth beneath one's feet." Its use for the mythological realm of the dead dates back to Old English translations of Latin "infernus" and Greek "Hades." The criminal sense emerged in the early 19th century, first recorded in 1818, referring to the hidden, lawless parts of society — a metaphorical extension of the idea of a world existing below the visible surface of ordinary life.