Definitions for: Underground

[n] electric underground railway
[n] a secret group organized to overthrow a government or occupation force
[adv] beneath the surface of the earth; "water flowing underground"
[adv] in or into hiding or secret operation; "the organization was driven underground"
[adj] used of independent armed resistance forces; "guerrilla warfare"; "partisan forces"
[adj] 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"
[adj] under the level of the ground; "belowground storage areas"; "underground caverns"

Webster (1913) Definition: Un"der*ground`, n.
The place or space beneath the surface of the ground;
subterranean space.

A spirit raised from depth of underground. --Shak.

Un"der*ground`, a.
1. Being below the surface of the ground; as, an underground
story or apartment.

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

Underground railroad or railway. See under Railroad.

Un"der*ground`, adv.
Beneath the surface of the earth.

Synonyms: belowground, clandestine, cloak-and-dagger, covert, guerilla(a), guerrilla(a), hole-and-corner(a), hugger-mugger, hush-hush, irregular, metro, on the quiet(p), partisan, partizan, resistance, secret, subsurface, subway, surreptitious, tube, undercover

See Also: Maquis, railroad, railroad line, railway, railway line, railway system, revolutionary group

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