underground

Noun · Adjective · Adverb
Synonyms: resistancemetrotubesubway systemsubwaybelowgroundclandestinecloak-and-daggerhole-and-corner(a)hugger-muggerhush-hushsecret

WordNet 3.0

Noun (2)

  1. a secret group organized to overthrow a government or occupation forceSynonyms: resistance
  2. an electric railway operating below the surface of the ground (usually in a city)“in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'”Synonyms: metrotubesubway systemsubway

Adjective (2)

  1. under the level of the ground“belowground storage areas”“underground caverns”Synonyms: belowground
  2. conducted with or marked by hidden aims or methods“clandestine intelligence operations”“cloak-and-dagger activities behind enemy lines”“hole-and-corner intrigue”“secret missions”“a secret agent”“secret sales of arms”“surreptitious mobilization of troops”“an undercover investigation”“underground resistance”Synonyms: clandestinecloak-and-daggerhole-and-corner(a)hugger-muggerhush-hushsecretsurreptitiousundercover

Adverb (2)

  1. in or into hiding or secret operation“the organization was driven underground”
  2. beneath the surface of the earth“water flowing underground”
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Webster's Dictionary (GCIDE)

Subway \Sub"way`\, n.

1.An underground way or gallery; especially, a passage under a street, in which water mains, gas mains, telegraph wires, etc., are conducted. [1913 Webster]

2.An underground railroad, usually having trains powered by electricity provided by an electric line running through the underground tunnel. It is usually confined to the center portion of cities; -- called also tube, and in Britain, underground. In certain other countries (as in France or Russia) it is called the metro. [PJC]

Underground \Un"der*ground`\, adv. Beneath the surface of the earth. [1913 Webster]
Underground \Un"der*ground`\, n.

1.The place or space beneath the surface of the ground; subterranean space. [1913 Webster]

A spirit raised from depth of underground.— Shak.[1913 Webster]

2.a subway or subway system, especially in the United Kingdom. [chiefly British] [PJC]

3.a secret organization opposed to the prevailing government; as, the French underground during the Nazi occupation. [PJC]

4.a group or movement holding unorthodox views in an environment where conventional ideas dominate, as in artistic circles. [PJC]

Underground \Un"der*ground`\, a.

1.Being below the surface of the ground; as, an underground story or apartment. [1913 Webster]

2.Done or occurring out of sight; secret. [Colloq.] [1913 Webster]

Underground railroad or Underground railway. See under Railroad. [1913 Webster]

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