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English to English adjective
| 1 |
Being below the surface of the ground; as, an underground story or apartment. |  | source: webster1913 adjective satellite
| 2 |
under the level of the ground | | Example: belowground storage areas
underground caverns
source: wordnet30
| 3 |
conducted with or marked by hidden aims or methods | | Example: 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
source: wordnet30 adverb
| 4 |
in or into hiding or secret operation | | Example: the organization was driven underground
source: wordnet30
| 5 |
beneath the surface of the earth | | Example: water flowing underground
source: wordnet30
| 6 |
Beneath the surface of the earth. | | source: webster1913 noun
| 7 |
a secret group organized to overthrow a government or occupation force | | source: wordnet30
| 8 |
an electric railway operating below the surface of the ground (usually in a city) | | Example: in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'
source: wordnet30
| 9 |
The place or space beneath the surface of the ground; subterranean space. | | source: webster1913
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