English Reference
noun

underworld

n.
US /ˈəndɝˌwɝɫd/ UK /ˈʌndəwˌɜːld/ un·der·world UK spelling underworlds

  1. 01 B2 Upper Intermediate

    the secret part of society where people are involved in serious crime and illegal business.

    the collective environment of individuals and organisations engaged in professional or organised crime.

    Simple

    The police spent years trying to find the leaders of the city's criminal underworld.

    In context

    Investigative journalists often risk their lives to expose the connections between legitimate businesses and the local criminal underworld.

    ganglandcriminality
  2. 02 B2 Upper Intermediate Literary Religion

    in ancient stories, the place under the earth where the spirits of the dead go.

    the mythological or religious realm of the dead, typically conceived as being located beneath the surface of the earth.

    Simple

    In Greek myths, Orpheus traveled to the underworld to bring back his wife.

    In context

    The epic poem describes the hero's descent into the underworld to seek guidance from the spirits of his ancestors.

    afterlifehadesnetherworld
  3. 03 C1 Advanced Informal Computing

    the part of a video game world that is located underground.

    the subterranean portion of a game's environment, often featuring distinct mechanics or higher difficulty.

    Simple

    You need to find a secret tunnel to enter the underworld in this level.

    In context

    Players must navigate the treacherous underworld to collect the rare minerals required for high-level crafting.

    subterranean level

Local media linked the incident to the criminal underworld of Dutch drug lord Jos Leijdekkers, also known as “Bolle Jos” (“Fat Jos”).

Al Jazeera· 1 Sept 2026

It’s all a grift in some grimy, gaming-adjacent underworld.

The Guardian· 28 Aug 2026

From under- + world.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated