Definition of underground in English:

underground

Line breaks: under|ground

adverb

Pronunciation: /ʌndəˈgraʊnd
 
/
  • 1Beneath the surface of the ground: miners working underground
    More example sentences
    • Rescue operations can be lengthy and often members spend hours underground and on the surface in cold and wet conditions.
    • It develops its root system for about ten years underground before it surfaces.
    • The tunnelling will take place so deep underground that nobody will hear it on the surface.
    Synonyms
    below ground, below the surface, under the earth, in the earth
  • 1.1In or into secrecy or hiding, especially as a result of carrying out subversive political activities: many were forced to go underground by the government
    More example sentences
    • You know, just in case I might really need to go underground some day.
    • Once we decided to go underground we had to find money and food and the means to carry out the actions.
    • The state, like much of the nation as a whole, had a long history of underground industrial activity, especially in times of civil and military conflict.
    Synonyms
    into hiding, into secrecy, into seclusion, undercover, behind closed doors, out of sight

adjective

Pronunciation: /ˈʌndəgraʊnd
 
/
Back to top  

noun

Pronunciation: /ˈʌndəgraʊnd
 
/
Back to top  
  • 1 (often the Underground) British An underground railway, especially the one in London: travel chaos on the Underground
    More example sentences
    • The Undergrounds were packed like canned sardines.
    • In Camden Town, I'll meet you by the Underground.
    • I then got the Underground and the train to Westcliff.
    Synonyms
    underground railway, metro; North American subway
    British informal tube
  • 2A group or movement organized secretly to work against an existing regime: the French underground
    More example sentences
    • She got involved in the socialist underground, producing leaflets and intervening in strikes.
    • Activists are aiming to build on the general feeling over the issue to get support across the underground for the dispute.
    • The solidarity of the underground was deeper than the fear of secret police my countrymen shared.
    Synonyms
  • 2.1A group or movement seeking to explore alternative forms of lifestyle or artistic expression: the late sixties underground
    More example sentences
    • The mad collision of cultures and styles found in these tracks represents the alternative underground's resistance to that conservatism.
    • There is a world of information being shared digitally however in the latest revolutionary attempt by the artistic and literary underground.
    • The California underground has long been a breeding ground for forward-thinking hip-hop.

verb

[with object] Back to top  
  • Lay (cables) below ground level: sections of electricity line had been undergrounded (as noun undergrounding) the environment secretary ordered the undergrounding of cables
    More example sentences
    • The City of Laguna is undergrounding all the ugly wires and utility poles.

More definitions of underground

Definition of underground in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day astrogation
Pronunciation: ˌastrəˈgāSHən
noun
(in science fiction) navigation in outer space