51Թ

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View synonyms for

underground

[uhn-der-ground, uhn-der-ground]

adverb

  1. beneath the surface of the ground: ground.

    traveling underground by subway.

  2. in concealment or secrecy; not openly.

    subversion carried on underground.



adjective

  1. existing, situated, operating, or taking place beneath the surface of the ground. ground.

  2. used, or for use, underground.

  3. hidden or secret; not open.

    underground political activities.

  4. published or produced by political or social radicals or nonconformists.

    an underground newspaper.

  5. avant-garde; experimental.

    an underground movie.

  6. critical of or attacking the established society or system.

    underground opinion.

  7. of or for nonconformists; unusual.

    an underground vegetarian restaurant.

noun

  1. the place or region beneath the surface of the ground. ground.

  2. an underground space or passage.

  3. a secret organization fighting the established government or occupation forces.

    He fought in the French underground during the Nazi occupation of France.

  4. (often initial capital letter)a movement or group existing outside the establishment and usually reflecting unorthodox, avant-garde, or radical views.

  5. Chiefly British.a subway system.

verb (used with object)

  1. to place beneath the surface of the ground: ground.

    to underground utility lines.

underground

adjective

  1. occurring, situated, or used below ground level

    an underground tunnel

    an underground explosion

  2. secret; hidden

    underground activities

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adverb

  1. going below ground level

    the tunnel led underground

  2. into hiding or secrecy

    the group was driven underground

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a space or region below ground level

    1. a movement dedicated to overthrowing a government or occupation forces, as in the European countries occupied by the German army in World War II

    2. ( as modifier )

      an underground group

  2. US and Canadian equivalent: subway.an electric passenger railway operated in underground tunnels

  3. (usually preceded by the)

    1. any avant-garde, experimental, or subversive movement in popular art, films, music, etc

    2. ( as modifier )

      the underground press

      underground music

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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51Թ History and Origins

Origin of underground1

First recorded in 1565–75; under- + ground 1
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Example Sentences

Examples have not been reviewed.

The robot can inspect miles of pipes over a 30-day period and automatically report back issues from underground.

From

She accused the president of upending the lives of hard-working people and their families, sending people underground and fanning the flames of protest by deploying troops.

From

These munitions, known as "bunker busters", have been used by Israel in the past to target underground facilities in both Gaza and Lebanon.

From

Although having netted in underground car parks in Kuala Lumpur and been fascinated by the the size of Jonah Lomu's lunch, perhaps the tournament was approached in a more leisurely fashion.

From

Iran continued with some activities until 2009 - when Western powers revealed the construction of the Fordo underground enrichment facility - but after that there were "no credible indications" of weapons development, the agency concluded.

From

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