Underground

Underground may refer to:

Underground rapid transit system, urban railway
- London Underground, a metro system that covers the Greater London area
Underground economy, a market consisting of commerce on which applicable taxes and/or regulations of trade are being avoided
Underground cultures, subcultures not considered mainstream
Resistance movement, an opposition to an invader, a political position, or to a government
Underground Railroad, a network of secret routes and safe houses used by 19th century slaves in the U.S. to escape to free states

Film

Underground (Analog Pussy album), a 2001 album by Analog Pussy
Underground (Ben Folds Five song), a 1995 song by Ben Folds Five
Underground (Britney Spears single), a 2008 single by Britney Spears.
Underground (Keaggy album), a 1983 album by guitarist Phil Keaggy
Underground (Electric Prunes album), a 1967 album by The Electric Prunes
Underground (soundtrack), soundtrack to the Emir Kusturica film by Goran Bregović
Underground (song), a 1986 single by David Bowie featured in the film Labyrinth
Underground (Thelonious Monk album), a 1967 jazz recording by Thelonious Monk
Underground music, a variety of music subgenres that usually develop a subcultural cult following despite their lack of mainstream appeal, visibility, or commercial promotion.
Underground Operations, a Toronto-based independent punk rock record label
Underground Resistance, a musical collective from Detroit, Michigan
Global Underground, a music label which symbolizes the international explosion of dance music during the 1990s
Linkin Park Underground, the Linkin Park fan club
The Underground (concert venue), a Christian-affiliated concert venue, operated in the Greater Cincinnati area
The Union Underground, an inactive Rock band associated with WWE

Underground (Stargate Atlantis), a Stargate Atlantis television series episode
The Underground (TV series), a sketch comedy show starring Damon Wayans.
TCM Underground, a late-night cult film showcase airing on Turner Classic Movies

The Underground (Animorphs), the seventeenth book in the Animorphs series by K.A. Applegate
Underground (stories), a collection of non-fiction interviews compiled by Haruki Murakami
Notes From Underground (1864), a short novel by Fyodor Dostoevsky
Underground (book), a 1997 book by Suelette Dreyfus reconstructing the actions of a group of hackers
Underground (novel), a 2006 Australian novel by Andrew McGahan

Underground (role playing game), a satirical role playing game developed by Mayfair Games
Medal of Honor: Underground, the second in the Medal of Honor series by EA Games
Need for Speed: Underground, a video game published by Electronic Arts
Need for Speed: Underground 2, the sequel to Need for Speed: Underground
Tony Hawk's Underground, a video game published by Activision Studios
Tony Hawk's Underground 2, the sequel to THUG by Activision Studios