underground

adverb
un·​der·​ground | \ ˌən-dər-ˈgrau̇nd How to pronounce underground (audio) \

Definition of underground

 (Entry 1 of 3)

1 : beneath the surface of the earth
2 : in or into hiding or secret operation

underground

noun
\ ˈən-dər-ˌgrau̇nd How to pronounce underground (audio) \

Definition of underground (Entry 2 of 3)

1 : a subterranean space or channel
2 : an underground city railway system
3a : a movement or group organized in strict secrecy among citizens especially in an occupied country for maintaining communications, popular solidarity, and concerted resistive action pending liberation
b : a clandestine conspiratorial organization set up for revolutionary or other disruptive purposes especially against a civil order
c : an unofficial, unsanctioned, or illegal but informal movement or group especially : a usually avant-garde group or movement that functions outside the establishment

underground

adjective
un·​der·​ground | \ ˈən-dər-ˌgrau̇nd How to pronounce underground (audio) \

Definition of underground (Entry 3 of 3)

1 : being, growing, operating, or situated below the surface of the ground
2 : conducted by secret means
3a : existing outside the establishment an underground literary reputation
b : existing outside the purview of tax collectors or statisticians the underground economy
4a : produced or published outside the establishment especially by the avant-garde underground movies underground newspapers
b : of or relating to the avant-garde underground an underground moviemaker an underground theater

Examples of underground in a Sentence

Adverb They had been living underground as fugitives. Noun I've ridden on the New York subway, the Paris Metro, and the London Underground. joined the underground while still a teenager Adjective The drugs are supplied through an underground network. She loves the city's underground music scene.
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Recent Examples on the Web: Adverb Many Afghan social media influencers have also deactivated their Facebook and Twitter accounts and gone underground. BostonGlobe.com, 30 Aug. 2021 Many Afghan social media influencers have also deactivated their Facebook and Twitter accounts and gone underground. New York Times, 30 Aug. 2021 While some medics have gone underground, others have fled from the cities to the border areas. Kristen Gelineau And Victoria Milko, Star Tribune, 6 July 2021 Interestingly, a glimpse at the elevator control panel shows there are at least four elevator buttons below the ground level button, indicating four unseen floors—presumably underground. Kyle Mizokami, Popular Mechanics, 10 Nov. 2021 Carbon capture and storage means collecting GHG (usually CO2, the dominant component) and burying it deep underground. Ian Palmer, Forbes, 26 Oct. 2021 Utility companies have proposed their own storm-proofing measures, including burying power lines underground. Arkansas Online, 25 Oct. 2021 Utility companies have proposed their own storm-proofing measures, including burying power lines underground. Washington Post, 24 Oct. 2021 Vale said the incident happened when a scoop bucket being sent underground Sunday afternoon detached, blocking the mine shaft. NBC News, 28 Sep. 2021 Recent Examples on the Web: Noun To steam the corn underground, Bex and her husband first build a fire, which heats up the dirt a few feet down. Priscilla Totiyapungprasert, The Arizona Republic, 30 Nov. 2021 An acetate was leaked to a reporter in September 1969 (supposedly by John Lennon, of all people) and quickly spread throughout the counterculture underground. Jordan Runtagh, PEOPLE.com, 15 Nov. 2021 In reality, from its beginnings in the early 19th century, the underground thrived by virtue of a dynamic partnership between blacks both free and enslaved and whites, first Quakers and later evangelical Christians and others. Fergus M. Bordewich, WSJ, 4 June 2021 The serious profits for such a young criminal gang — DarkSide was established only last August, according to computer security researchers — underscore how the Russian-language cybercriminal underground has mushroomed in recent years. New York Times, 29 May 2021 The serious profits for such a young criminal gang — DarkSide was established only last August, according to computer security researchers — underscore how the Russian-language cybercriminal underground has mushroomed in recent years. BostonGlobe.com, 12 May 2021 Less than two months ago, Kim Kardashian's neighbor filed a lawsuit against the Hidden Hills Community Association asking a judge to prevent the reality star from adding various underground features to her property. Hannah Chubb, PEOPLE.com, 5 Nov. 2021 Set in the utopian region of Piltover and the oppressed underground of Zaun, the story follows the origins of two iconic League champions-and the power that will tear them apart. Jacob Siegal, BGR, 27 Oct. 2021 In addition to the Salobo expansion, two large near-term projects underway are Pampacancha ramp-up (a satellite of the Constancia mine), and the underground at Voisey’s Bay, which just commenced initial mining. Moneyshow, Forbes, 25 Oct. 2021 Recent Examples on the Web: Adjective In early November, her Range Rover was found in the underground parking garage of a residential building several blocks away. Hayley Smith, Los Angeles Times, 29 Nov. 2021 Critics are still wondering if underground tunnels make sense in South Florida, with its king tides, hurricanes and porous limestone bedrock. Susannah Bryan, sun-sentinel.com, 31 Oct. 2021 Public transportation was in freefall, symbolized by a subway zipping through underground tunnels in the summer of 2015 with a door perilously wide open threatening to suck passengers into a black hole. Amy Kellogg, Fox News, 5 Oct. 2021 Capitol security officials are taking the event seriously, with House sergeant-at-arms William Walker telling lawmakers and staff in an alert on Tuesday to avoid the Capitol if possible and use underground tunnels to traverse the campus. Andrew Solender, Forbes, 15 Sep. 2021 And the mall's labyrinthine system of underground tunnels are to be repurposed as residents' parking. Jc Reindl, Detroit Free Press, 11 Sep. 2021 In July, the Chinese city of Zhengzhou was devastated by flooding that killed subway passengers and motorists unable to escape from underground tunnels. Jessie Yeung, CNN, 6 Sep. 2021 Quality of the 156-mile river system has improved in recent years, helped by multibillion-dollar construction of new reservoirs and underground tunnels. From Usa Today Network And Wire Reports, USA TODAY, 3 Sep. 2021 At least a dozen people died in the city's underground tunnels, with at least seven more still missing. Brittyn Clennett, ABC News, 22 July 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'underground.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of underground

Adverb

14th century, in the meaning defined at sense 1

Noun

1594, in the meaning defined at sense 1

Adjective

1601, in the meaning defined at sense 1

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Time Traveler for underground

Time Traveler

The first known use of underground was in the 14th century

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Dictionary Entries Near underground

undergroom

underground

undergrounder

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Statistics for underground

Last Updated

30 Nov 2021

Cite this Entry

“Underground.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underground. Accessed 6 Dec. 2021.

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More Definitions for underground

underground

adverb

English Language Learners Definition of underground

 (Entry 1 of 3)

: below the surface of the earth
: in or into a place that is hidden or secret : out of the view of the public

underground

noun

English Language Learners Definition of underground (Entry 2 of 3)

: a system of trains that run below the ground in a large city : subway
: a group of people who secretly work to oppose or overthrow a government

underground

adjective

English Language Learners Definition of underground (Entry 3 of 3)

: located or occurring below the surface of the earth
: secret and usually illegal
: of, relating to, or produced in a social and artistic world that is different and separate from the main part of society

underground

adverb
un·​der·​ground | \ ˌən-dər-ˈgrau̇nd How to pronounce underground (audio) \

Kids Definition of underground

 (Entry 1 of 3)

1 : below the surface of the earth
2 : in or into hiding or secret operation The rebels went underground.

underground

noun
un·​der·​ground | \ ˈən-dər-ˌgrau̇nd How to pronounce underground (audio) \

Kids Definition of underground (Entry 2 of 3)

1 : subway
2 : a secret political movement or group

underground

adjective
un·​der·​ground | \ ˈən-dər-ˌgrau̇nd How to pronounce underground (audio) \

Kids Definition of underground (Entry 3 of 3)

1 : located under the surface of the ground underground pipes
2 : done or happening secretly an underground revolt

More from Merriam-Webster on underground

Nglish: Translation of underground for Spanish Speakers

Britannica English: Translation of underground for Arabic Speakers

Britannica.com: Encyclopedia article about underground

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